Puppy Activity Level: An Evidence-Based Guide to Puppy Exercise, Growth Plates, and Developmental Safety
- Lorena Caballero
- Mar 30
- 20 min read
Updated: Apr 2
VISALORE WHIPPETS
Field Notes
INTRODUCTION: WHY THIS GUIDE EXISTS
If you have just brought home a Whippet puppy, you have almost certainly already encountered some outdated advice about exercise. Some sources will tell you to severely limit your puppy’s movement until twelve to eighteen months of age. Others will suggest the now-famous “5-minute rule” that recommends five minutes of exercise per month of age. Your breeder may have her own protocols. Your vet may have different guidance still.
Here is what you need to understand before you read anything else: the vast majority of published research on puppy exercise restrictions was conducted on large and giant breeds with known, high genetic predisposition to hip dysplasia; breeds like Labrador Retrievers, Newfoundlands, Leonbergers, and German Shepherds. These studies were designed to understand a disease that disproportionately affects heavy, fast-growing, structurally loadbearing dogs with documented joint laxity. They were not designed with lean, compact, athletically built coursing sighthounds, like Whippets, in mind. Critically, their findings have been applied to all dogs as if breed, body type, biomechanics, and genetic predisposition simply do not matter - they absolutely do.
To date and to my knowledge, there is no peer-reviewed research specifically examining puppy exercise guidelines in Whippets. The research gap is real. This guide does not pretend otherwise. What it does instead is synthesize the best available veterinary science, identify where that science came from and for whom it was designed, and help you apply it intelligently to a breed that is categorically different from the populations most studies were built around.
The goal is not to maximize or minimize exercise for your puppy. It is to help you understand what the evidence actually supports, so you can make informed decisions for a dog that is built to sprint.
Let’s take a deep dive…
WHERE THE RESEARCH COMES FROM...AND WHY IT MATTERS
THE LARGE-BREED BIAS OF THE EXERCISE LITERATURE
The most influential studies on puppy exercise and developmental orthopedic disease were designed specifically to investigate canine hip dysplasia (CHD) - a condition that is overwhelmingly concentrated in large and giant breeds with heavy body mass, rapid growth rates, and genetically predisposed joint laxity.
The landmark Krontveit et al. (2012) study, published in the American Journal of Veterinary Research and widely cited in virtually every puppy exercise guide in existence, followed 501 dogs from four breeds: Newfoundlands, Labrador Retrievers, Leonbergers, and Irish Wolfhounds.
The cartilage exercise studies most commonly cited in this space: the Kiviranta et al. (1987, 1988) and Arokoski et al. (1993) papers from the University of Kuopio, Finland - were conducted exclusively on Beagles exercised on controlled laboratory treadmills. Beagles are a structurally moderate breed with low hip dysplasia risk. The authors themselves acknowledged limitations of extrapolating these findings across breed types (as noted in Veterinary Practice, 2024). These studies were not conducted on free-roaming dogs on natural terrain, nor were they conducted on sighthounds.
The Slater et al. (1992) study on diet and exercise as risk factors for osteochondritis dissecans, another study frequently invoked in puppy exercise discussions, was conducted in dogs predisposed to a disease that Whippets do not exhibit at meaningful rates.
The practical implication is significant: when your veterinarian, breeder community, or online source cites research to justify exercise restrictions for your Whippet puppy, it is worth asking which breeds that research was actually built on, because the answer is almost certainly not yours.
LEAN COURSING MEDIUM-SIZED SIGHTHOUNDS VS. GIANT SIGHTHOUNDS: A CRITICAL DISTINCTION
A note on the Irish Wolfhound inclusion is warranted here, because it matters for your interpreting and applying what evidence is shared in this guide: although Irish Wolfhounds are technically classified as sighthounds by the FCI and AKC, they are functionally and biomechanically a giant breed. This grouping reflects shared hunting-by-sight heritage, but it has created a meaningful source of confusion in breed-specific health discussions because the two ends of the sighthound spectrum are biomechanically, developmentally, and orthopedically quite different. Including them alongside Newfoundlands and Leonbergers in the Krontveit study was biomechanically appropriate. Treating them as evidence about lean medium sized coursing sighthounds, like the Whippet, is not. The study’s conclusions, including the recommendation that puppies under three months not use stairs, were explicitly drawn for these four heavy breeds. The authors state this directly: “These findings could be used as practical recommendations for the prevention of HD in Newfoundlands, Labrador Retrievers, Leonbergers, and Irish Wolfhounds” (Krontveit et al., 2012, p. 838).
The Whippet, a lean, compact medium-sized coursing sighthound, has a specific set of structural characteristics that confer genuine orthopedic resilience: low adult body mass of 25–40 lbs, minimal subcutaneous fat, highly defined musculature, tight joint articulation with low passive laxity, and earlier skeletal ossification patterns. DVM360 veterinary proceedings specifically note that athletic dogs like Whippets and Greyhounds are characterized by “well defined and firm muscles, tightly adherent skin with 1% to 2% fat in the soft tissues of the hindquarters,” which is in direct contrast to the 5–10% hindquarter fat and soft musculature of high-CHD giant breeds (DVM360, 2011). Research on CHD diagnosis and prevention further notes that “comparably earlier joint ossification appears to occur in Greyhounds, a breed with one of the lowest incidences of CHD” (Schachner et al., 2015). OFA registry data confirm the outcome: Italian Greyhound CHD prevalence is documented at 0%, and sighthounds as an FCI group are the lowest-CHD reference category across 921,046 registry records (Loder & Todhunter, 2017).
The Irish Wolfhound occupies the opposite end of the sighthound spectrum. Adult males weigh 140 to 180+ pounds (multiple times the weight of a Whippet) and stand 32 to 35 inches at the shoulder, making them among the tallest domestic dog breeds in the world (iHeartDogs, 2025). Their growth trajectory is extreme: a male Irish Wolfhound puppy reaches approximately 95 pounds by six months of age and does not achieve full skeletal maturity until 22 to 24+ months, with full muscle and body mass not completed until three to three and a half years (DogSize, 2025; iHeartDogs, 2025). The IWCA documents that the Irish Wolfhound’s “truly astounding” puppy growth rate is directly implicated in developmental joint problems including OCD, elbow bursae, and panosteitis; conditions driven by rapid mass loading on developing cartilage, not by coursing mechanics (IWCA, n.d.). Their inclusion in the Krontveit et al. (2012) study alongside Newfoundlands and Leonbergers was biomechanically appropriate: all four breeds share the rapid-growth, heavy-loading profile that makes CHD research relevant to them.
The practical implication for this guide is precise: when we argue that the Krontveit study’s exercise guidelines do not straightforwardly apply to Whippets, we are not arguing that sighthound classification alone confers protection. We are arguing that the specific structural characteristics of lean, compact, low-laxity coursing sighthounds, body mass, ossification rate, joint architecture, and fat-to-muscle ratio, are categorically different from the breeds the research was built on. Irish Wolfhound puppies, despite their sighthound classification, are not members of that category.
THE BEAGLE STUDIES: WHAT THEY ACTUALLY SHOW
The most-cited exercise physiology research in the puppy exercise literature was conducted at the University of Kuopio, Finland, on young female Beagle dogs exercised on motorized treadmills at a 15-degree incline. Understanding what these studies actually showed, and what they did not show, is essential context for any Whippet owner.
Kiviranta et al. (1988) found that Beagle puppies starting at 15 weeks of age who jogged 4 km/day (approx. 2.5 miles/day), 5 days per week, for 15 weeks demonstrated a 6% increase in articular cartilage stiffness and an 11% increase in cartilage thickness compared to sedentary controls. This is a pro-exercise finding: moderate, structured activity improved cartilage quality in growing dogs.
Kiviranta et al. (1992) then studied the effects of strenuous running of 20 km/day (approx. 12.4miles/day) for 15 weeks. At this intensity, uncalcified cartilage thickness decreased by 6% in the medial femoral condyle and glycosaminoglycan concentration fell by an average of 11%. This finding suggests that high-volume, high-intensity forced running does carry cartilage adaptation costs.
Arokoski et al. (1993) extended this further to 40 km/day (approx. 24.9 miles/day) over a full year, constituting an extreme endurance protocol by any standard, and found site-dependent decreases in glycosaminoglycan content, though cartilage surfaces remained intact.
Newton et al. (1997), a study that won the 1996 Cabaud Award, took the longest view of all: dogs exercised at 3 km/hr (approx. 1.9miles/hr) for 75 minutes, 5 days per week, for 527 weeks (a little over 10 years), while carrying jackets weighing 130% of their body weight. After more than a decade of sustained, weighted exercise, there were no ligament or meniscal injuries, no cartilage erosions, and no osteophytes. The conclusion was that lifetime moderate exercise did not cause articular cartilage degeneration.
What these studies collectively show is that the key variable is not duration or even intensity alone, it is whether exercise is appropriate to developmental stage, surface, and individual load tolerance. Moderate, structured exercise supports healthy cartilage. Extreme endurance exercise in a growing dog on hard surfaces, performed repetitively, carries cumulative risk. The binary of “exercise is dangerous” versus “exercise is fine” is not what the Beagle literature supports.
And critically: as explicitly noted in Veterinary Practice (2024), all of this research was conducted on Beagles, a structurally robust breed with low dysplasia risk, exercised on controlled laboratory treadmills, not on varied outdoor terrain. The applicability to Whippets exercising freely in a fenced yard is inferential, not direct.
THE "5-MINUTE RULE": A DEEPER LOOK
The “5 minutes of exercise per month of age, twice daily” rule is one of the most widely circulated pieces of puppy advice in dog-owning communities. It appears in breeder contracts, on veterinary clinic handouts, and across online forums. It is also, to be direct about it, not supported by peer-reviewed research.
Canine health and rehabilitation professionals have noted publicly that no published studies have been found to support this rule (Canine Health & Rehabilitation, 2023). The Veterinary Ireland Journal (2025) explicitly identifies it as a misconception, noting that this rule is frequently given to puppy owners as fact despite lacking evidence-based foundations. The Sit Stay Squat evidence-based puppy exercise curriculum similarly states that the 5-minute rule “is not evidence-based” and that its rigid application “is not supported by the available scientific literature” (Sit Stay Squat, 2025).
The rule likely emerged from a reasonable intuition that puppies should not be forced to endure sustained, adult-level exercise, and was formalized into a number by dog-sport and veterinary communities, primarily in the context of large working breeds. From there it propagated into general pet-owning culture as breed-agnostic doctrine.
There are several practical problems with applying it rigidly to a Whippet. First, it treats a 2-month-old Whippet the same as a 2-month-old Saint Bernard, despite their having virtually very little in common structurally or biomechanically. Second, it focuses exclusively on structured walk duration while ignoring the fact that self-directed free play, which is how puppies naturally exercise, may involve bursts of activity far exceeding any timed walk, and is generally considered beneficial. Third, it has no mechanism for accounting for surface, intensity, or type of movement: the variables that veterinary research consistently identifies as the most important factors in developmental orthopedic outcomes.
This is not an argument that you should let your Whippet puppy run unlimited distances or participate in adult athletic activities before skeletal maturity. It is an argument that a single number, applied universally, is a poor substitute for understanding what actually matters.
UNDERSTANDING GROWTH PLATES: BIOLOGY, NOT RULES
WHAT GROWTH PLATES ARE AND WHY THEY MATTER
Growth plates, also called epiphyseal plates or physes, are zones of developing hyaline cartilage located near the ends of long bones. They are the sites of endochondral ossification: the biological process by which cartilage is progressively replaced by mineralized bone during skeletal development (Sit Stay Squat, 2025). This process drives bone elongation and determines the final length and shape of each long bone.
During the period when growth plates remain open, they are structurally the weakest element in the entire skeletal assembly. Weaker than the surrounding ligaments, tendons, and joint capsules. A traumatic event that would produce only a sprain or soft-tissue injury in an adult dog can fracture or partially disrupt a growth plate in a puppy, potentially resulting in premature unilateral closure, limb shortening, angular deformity, or chronic joint dysfunction (The Balanced Dog, 2019; Messineo Lindquist, 2017).
In Whippets, growth plate closure varies by individual. As a medium-sized breed, most Whippets complete skeletal development between 12 and 15 months, earlier than large breeds (14–16 months) and significantly earlier than giant breeds (up to 24+ months). Dogs spayed or neutered before approximately 18 months may experience delayed growth plate closure due to reduced sex hormone signaling, as sex hormones are the primary trigger for physes mineralization (Krontveit et al., 2012; Meowant, 2025).
HOW GROWTH PLATE INJURIES ACTUALLY HAPPEN
This is one of the most important points in this entire guide, and it is frequently misrepresented: the veterinary literature does not support the idea that routine puppy play or supervised exercise causes premature growth plate closure. What it supports is that traumatic events such as falls, jumps from heights, collisions, and sudden torsional forces on a limb cause growth plate injuries (Sit Stay Squat, 2025; Canine Health & Rehabilitation, 2023).
The phenomenon that Jane Messineo Lindquist (creator of Puppy Culture) describes as the “Toddler Fracture” is illustrative: in young dogs (and young children), the periosteum (the fibrous outer layer of the bone) is relatively strong in proportion to the elastic, not-yet-mineralized bone beneath it. Any activity that places torque on a long bone therefore carries meaningful fracture risk in a very young dog. This is why activities involving sudden directional changes at speed, jumping from elevated surfaces, and collisions with larger animals carry real risk for young sighthound puppies whose bone-to-mass ratio and skeletal delicacy during the first six months of life is particularly pronounced.
What does not appear to cause growth plate injury is supervised, progressive, low-impact movement on appropriate surfaces. The Canine Health & Rehabilitation blog summarizes the evidence directly: “Very rarely is it [growth plate closure] caused by a puppy being allowed to freely play, or them being taken on a walk longer than fifteen minutes when they are three months of age” (Canine Health & Rehabilitation, 2023).
THE ROLE OF IMMOBILIZATION: TOO LITTLE MOVEMENT HAS COSTS TOO
The veterinary rehabilitation literature documents something that is less commonly discussed in consumer-facing puppy advice: cartilage and bone are living tissues that respond to loading. Immobilization, the absence of appropriate mechanical stimulus, has measurable negative consequences for joint health.
Palmoski et al. (1979) demonstrated that proteoglycan aggregation defects developed in normal canine knee cartilage under immobilization conditions, and that these changes were reversible with remobilization. This finding situates exercise not just as a risk to manage, but as a stimulus that supports normal tissue development. The Penn Vet Working Dog Center’s Fit to Work program, which begins puppies on structured fitness activities as young as 8 weeks, notes explicitly that “regular joint loading in a structured and progressive manner in young dogs may decrease the risk of musculoskeletal damage” (Otto et al., 2020).
The practical takeaway for Whippet owners: over-restricting puppy movement does not guarantee a healthier adult dog, and may in fact deprive developing joints of the stimulus they need to build cartilage thickness, joint stability, and proprioceptive coordination.
WHAT THE EVIDENCE ACTUALLY SUPPORTS FOR GROWING PUPPIES
SOFT, VARIED TERRAIN IS PROTECTIVE
The Krontveit et al. (2012) study, despite being built on large breeds, as discussed, produced one finding that is broadly applicable across breed types: outdoor exercise on soft, moderately irregular ground during early puppyhood was associated with reduced risk of hip dysplasia, while slippery indoor flooring was associated with increased risk. Puppies kept on slippery surfaces before weaning were 1.6 times more likely to develop hip dysplasia. We personally use anti-slip grip-ready surfaces inside and outside our whelping boxes from day one with our pups, as part of the Puppy Culture Program that we follow with our litters.
The mechanism is not mysterious. Natural outdoor terrain provides variable footing, engages stabilizer muscles, develops proprioception, and distributes mechanical loads across a broader range of joint angles than uniform indoor surfaces or consistent paved walks. For a Whippet puppy specifically, a breed that will eventually rely on finely tuned neuromuscular coordination to course at 32+ mph, early movement on varied soft terrain is not just safe - it is foundational to the adult athlete the puppy is becoming.
STAIR USE IN YOUNG PUPPIES: THIS RECOMMENDATION DOES HAVE EVIDENCE
One exercise restriction does have specific research support, and it applies across breed types: stair use before approximately three months of age. The Krontveit et al. (2012) study found that stair access from birth to three months of age was significantly associated with increased CHD risk in the study population. While this finding was generated in large breeds, the biomechanical mechanism of repetitive, constrained joint loading in a single plane during a period of maximum skeletal vulnerability, is plausibly generalizable.
Vet Rehab NI (2022) notes that stair use should be cautioned in puppies because it places repetitive strain on the elbows and stifles in a developmental window when those structures are particularly vulnerable to cumulative microtrauma. The Veterinary Ireland Journal (2025) flags avoiding stairs as one of the few restrictions with a plausible evidence basis, while noting that “avoid stairs entirely” as a blanket lifetime rule has been overstated.
The practical recommendation: carry your Whippet puppy on stairs through 12 weeks, support them on stairs from 3–6 months, and allow independent stair use progressively after that.
MODERATE, STRUCTURED EXERCISE SUPPORTS CARTILAGE HEALTH
The Beagle treadmill studies, despite their limitations for direct Whippet application, converge on a consistent finding: moderate exercise builds better cartilage than sedentary confinement. Kiviranta et al. (1988) demonstrated increased cartilage thickness and stiffness under moderate running conditions. Newton et al. (1997) found no cartilage degeneration in dogs sustained on lifetime moderate exercise. The Penn Vet Working Dog Center’s foundational fitness program documents safe developmental fitness training beginning at 8 weeks (Otto et al., 2020).
The qualifier “moderate” matters. The transition from benefit to harm appears to occur not at the level of normal puppy play or supervised leash walks, but at the level of high-volume forced endurance exercise (20 km/day, 40 km/day) the kinds of loads no responsible owner would impose on a puppy regardless of these studies.
BALL-CHASING, HIGH-SPEED FETCH, AND REPETITIVE IMPACT ARE GENUINE RISKS
Two categories of activity do carry meaningful peer-reviewed support as risk factors for developmental joint disease: repetitive high-speed impact activities, and running after thrown balls or sticks. Slater et al. (1992) identified running after thrown objects as a risk factor for osteochondritis dissecans (a cartilage disease affecting joint surfaces) in large-breed dogs. The mechanism involves the repetitive, jarring concussive impact of sudden deceleration and directional change at high speed: exactly what happens when a dog sprints full speed and then stops to catch or retrieve an object. For a Whippet, whose speed makes this pattern especially acute, high-speed fetch involving repeated full-sprint-and-stop cycles carries an elevated version of this risk during the growth phase.
This is distinct from free play or self-directed movement. A puppy romping across a yard, stopping and starting at its own pace, is engaging in species-appropriate developmental activity. A puppy chasing a ball launcher at full speed, ten or fifteen times in a row, on hard ground, is doing something structurally different and riskier.
WHIPPET-SPECIFIC CONSIDERATION
BREED ARCHITECTURE AND WHAT IT MEANS DEVELOPMENTALLY
Whippets are a medium-sized sighthound developed in England for racing and coursing. They are capable of speeds up to ~35 mph and are among the fastest domestic dog breeds relative to body size. Their structural hallmarks such as deep chest, minimal body fat, prominent musculature, flexible spine, and angular hindquarters, are optimized for explosive acceleration, high-speed directional change, and sustained sprint performance. These same features create specific developmental considerations.
The Whippet’s elegant bone structure is deceptively delicate in puppyhood. Relative to their eventual adult muscle mass and athletic capacity, young Whippet puppies carry proportionally fragile long bones, particularly the forelimbs. The periosteum-to-bone strength ratio that produces “Toddler Fractures” in puppies is especially relevant for a breed where the bone is long, the dog is lean, and impact forces from jumping or collision are concentrated on a slender skeletal frame.
At the same time, Whippets are not heavy-loading breeds. They do not carry the sustained gravitational force through hip joints that a Labrador or Newfoundland puppy does with every step. The hip dysplasia research built on large breeds is responding to a biomechanical problem that Whippets largely do not share. For comparison, the Italian Greyhound, has documented CHD prevalence of 0% in OFA registry data (Loder & Todhunter, 2017). The Greyhound is among the lowest-CHD breeds in veterinary medicine.
THE RESEARCH GAP
To be unambiguous: there is currently no peer-reviewed research examining puppy exercise guidelines specifically for Whippets or for sighthounds as an entire class. The exercise guidance in this document is synthesized from the best available general veterinary literature and applied through the lens of Whippet anatomy, genetics, and breed-specific risk factors. It is informed by the research that exists. It is not based on research that was designed for this breed.
If you are making decisions for a dog you intend to compete at the highest levels of lure coursing, FCAT, straight or oval racing, the most important thing you can do is work with a veterinarian who understands sighthound anatomy, and consider radiographic growth plate assessment before introducing any serious high-speed performance work.
COURSING, SPEED WORK, AND LURE ACTIVITIES
Lure coursing and FCAT are adult athletic activities. They involve full-speed sprinting, tight cornering, and rapid deceleration: exactly the combination of forces most likely to cause growth plate stress or torsional injury in a skeletally immature dog. These activities should not be formally or competitively introduced until growth plate closure is confirmed, ideally by radiographic evaluation, and even then should be introduced progressively.
The sighthound community has a long tradition of “straight line puppy fun runs,” which are brief, straight-course runs on soft turf with no turns, as a gentle introduction to chasing a lure. This is less biomechanically risky than full-course work because it eliminates the acute torsional forces of cornering. However, even puppy straight runs should be done with logic and developmental knowledge in mind, be kept brief (single run, not repeated), and take place on soft ground. The goal is to introduce the activity, not to condition for it.
PRACTICAL GUIDELINES BY DEVELOPMENTAL STAGE
The following framework synthesizes peer-reviewed veterinary literature, rehabilitation guidance, and Whippet-specific considerations. It is not based on a single rule. It is based on what the research collectively supports.
Age | Developmental Status | Recommended Approach |
8–12 weeks | Maximum skeletal vulnerability; growth plates fully open; periosteum relatively strong | Self-directed play on soft surfaces only. Carry on all stairs. Non-slip flooring indoors (rugs, yoga mats). Socialization outings on grass or soft ground at puppy’s pace. No ball-chasing, no jumping, no forced exercise of any kind. Allow frequent naps; 8-week puppies play 30–60 minutes and nap 1–2 hours cyclically. |
3–6 months | Skeletal still vulnerable; neuromuscular coordination improving; proprioception developing | Leash walks on grass or dirt trails (15–20 min, 2x daily). Free play in a securely fenced yard at puppy’s pace. Introduce varied terrain (gentle hills, different surfaces). Supported stair use. Begin basic proprioceptive work (cavaletti poles on ground, different surface textures). No repetitive ball-chasing, no jumping from heights, no sustained running on hard surfaces. |
6–12 months | Growth plates still open; major muscle development phase; coordination maturing | Gradually increasing leash walks (up to 30–40 min by 9 months). Off-leash free play on soft, enclosed ground. Begin light coordination and strengthening work (low cavaletti, balance work). Continue avoiding repetitive high-impact activities. Straight-line puppy runs on soft turf, kept brief. No full lure coursing, no high-speed fetch, no forced running on pavement. |
12–18 months | Growth plates closing; athletic capacity developing; approaching adult structure | Consult veterinarian about growth plate closure (radiographic confirmation recommended before any performance sport). Begin progressive introduction of athletic activities once cleared. Lure coursing and FCAT after the dog’s first birthday. Continue monitoring for lameness, gait changes, or fatigue. |
READING YOUR PUPPY: FATIGUE OBSERVATION OVER TIME RULES
Across all of the veterinary and rehabilitation literature reviewed for this guide, the single most consistent practical recommendation is this: observe your puppy for signs of fatigue, and stop exercise when those signs appear. Fatigue-based monitoring is not a supplement to time-limit rules - it largely replaces them (Veterinary Practice, 2024; Vet Rehab NI, 2022).
The biomechanical reason is straightforward. A fatigued puppy has degraded neuromuscular control. Stabilizer muscles are failing. Proprioceptive feedback is impaired. Gait mechanics break down. These are the conditions under which a stumble, a sudden twist, or an awkward landing becomes a growth plate injury. A puppy that is moving well and tracking normally is generating appropriate, adaptive mechanical loads through healthy tissue. A puppy that is tripping, dragging toes, moving wide-based, or lagging behind is absorbing those same loads through a compromised mechanical system.
Stop immediately and allow rest when you observe any of the following:
• Lagging behind on a walk, slowing unprompted, or sitting/lying down during activity
• Panting disproportionate to temperature or effort
• Wide-based stance or uncoordinated gait
• Stumbling, toe-dragging, or crossing of limbs
• Increased mouthing, vocalizing, or difficulty settling after activity
• Lying down and refusing to get up
• Any lameness, limping, or asymmetric weight distribution (consult a veterinarian)
Whippet puppies are highly motivated animals. They will often continue playing past the point of safe fatigue because their prey drive and social motivation override physical signals. This is particularly true in the context of free play with other dogs. It is the owner’s responsibility to observe body language and intervene, not to wait for the puppy to self-regulate, because sighthound puppies will often run until they fall over.
QUICK REFERENCE: WHAT TO AVOID AND WHY
HIGH-RISK ACTIVITIES
• Jumping from elevated surfaces (furniture, vehicles, decks): Primary cause of growth plate fractures. Even a 2-foot drop can produce significant torsional force in a puppy with elastic, not-yet-mineralized long bones. This is very challenging with a whippet puppy who likes to fly over the back of a couch at full speed.
• Repetitive ball-chasing and fetch at speed: Identified in Slater et al. (1992) as a risk factor for osteochondritis dissecans. The sprint-and-stop-and-turn pattern concentrates impact at joints during high-velocity deceleration.
• Stair use under 3 months: Specifically documented in Krontveit et al. (2012) as a CHD risk factor in large breeds; plausibly applicable across breeds on biomechanical grounds.
• Forced endurance running (jogging alongside cyclist or runner): Puppies do not have the cardiovascular or musculoskeletal conditioning for sustained endurance work. Their aerobic capacity gains from endurance training are minimal (up to 10%, compared to 30% in adults) (Messineo Lindquist, 2017).
• Wrestling or rough play with much larger or heavier dogs: Body-slam and collision forces from a large adult dog can exceed the structural limits of a puppy’s growth plates and long bones.
• Sustained running on hard surfaces (concrete, asphalt): Hard surfaces transmit higher peak impact forces through joints than soft or varied terrain (Krontveit et al., 2012).
• Slippery indoor flooring without traction: Directly associated with increased hip dysplasia risk in Krontveit et al. (2012). Affects joint development even in pre-weaning puppies.
• Competitive full lure coursing, FCAT, agility before growth plate closure: High-speed performance sports combine acute torsional forces, tight cornering, and rapid deceleration in ways that are inappropriate for a skeletally immature dog.
WHAT IS ACTIVELY BENEFICIAL
• Self-directed play on soft, varied outdoor terrain from an early age
• Short, leash walks at puppy’s own pace on grass or dirt trails
• Socialization exposure involving gentle movement across different surfaces
• Free play with age- and size-matched puppies in enclosed safe spaces
• Progressive proprioceptive and coordination work from 3–6 months onward
• Non-slip flooring and traction surfaces throughout the home
• Adequate rest and sleep (puppies consolidate neurological development during sleep)
This post was researched and refined with AI tools, reviewed and personalized by me, Lorena Caballero, and had final edits by Isabel Zeilman.
REFERENCES
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Canine Health & Rehabilitation. (2023, October 1). Puppies, exercise and growth plates. https://www.caninehealthandrehabilitation.com/blog/puppies-exercise-and-growth-plates
DVM360. (2011, August 1). Canine hip dysplasia (proceedings). https://www.dvm360.com/view/canine-hip-dysplasia-proceedings
DogSize. (2025). Irish Wolfhound puppy weight calculator. https://dogsize.co/irish-wolfhound
iHeartDogs. (2025). Male & female Irish Wolfhound weights & heights by age. https://iheartdogs.com/male-female-irish-wolfhound-weights-heights-by-age
Irish Wolfhound Club of America. (n.d.). Orthopedic and joint issues. https://www.iwclubofamerica.org/orthopedics
Kiviranta, I., Jurvelin, J., Tammi, M., Säämänen, A. M., & Helminen, H. J. (1987). Weight bearing controls glycosaminoglycan concentration and articular cartilage thickness in the knee joints of young beagle dogs. Arthritis & Rheumatism, 30(7), 801–809. https://doi.org/10.1002/art.1780300710
Kiviranta, I., Tammi, M., Jurvelin, J., Säämänen, A. M., & Helminen, H. J. (1988). Moderate running exercise augments glycosaminoglycans and thickness of articular cartilage in the knee joint of young beagle dogs. Journal of Orthopaedic Research, 6(2), 188–195. https://doi.org/10.1002/jor.1100060205
Kiviranta, I., Tammi, M., Jurvelin, J., Arokoski, J., Säämänen, A. M., & Helminen, H. J. (1992). Articular cartilage thickness and glycosaminoglycan distribution in the canine knee joint after strenuous running exercise. Clinical Orthopaedics and Related Research, 283, 302–308. https://pubmed.ncbi.nlm.nih.gov/1395265/
Krontveit, R. I., Nødtvedt, A., Sævik, B. K., Ropstad, E., & Trangerud, C. (2012). Housing- and exercise-related risk factors associated with the development of hip dysplasia as determined by radiographic evaluation in a prospective cohort of Newfoundlands, Labrador Retrievers, Leonbergers, and Irish Wolfhounds in Norway. American Journal of Veterinary Research, 73(6), 838–846. https://doi.org/10.2460/ajvr.73.6.838
Loder, R. T., & Todhunter, R. J. (2017). The demographics of canine hip dysplasia in the United States and Canada. Journal of Veterinary Medicine, 2017, 5723476. https://doi.org/10.1155/2017/5723476
Meowant. (2025, December 4). Safe exercise limits for a growing puppy’s joints. https://meowant.com/blogs/dog-tips/safe-puppy-exercise-limits-joints
Messineo Lindquist, J. (2017, January 1). Puppy fitness that fits the puppy. https://madcapuniversity.com/blogs/articles-and-product-reviews/puppy-fitness-that-fits-the-puppy
Newton, P. M., Mow, V. C., Gardner, T. R., Buckwalter, J. A., & Albright, J. A. (1997). The effect of lifelong exercise on canine articular cartilage. American Journal of Sports Medicine, 25(3), 282–287. https://doi.org/10.1177/036354659702500302
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Visalore Whippets • Flagstaff, Arizona • visalorewhippets.com
This document is for informational purposes. Always consult your veterinarian for individual health guidance.
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