Growing Pains in Larger Doodles: Understanding Panosteitis
Growing Pains in Doodles: Understanding Panosteitis
Picture your goofy Doodle puppy suddenly slowing down, limping awkwardly, or just not being their usual bubbly self. For owners of larger Doodle breeds — Goldendoodles, Golden Mountain Doodles, Bernedoodles, and Australian Mountain Doodles — this scenario can point to Panosteitis, often called "growing pains" or simply "pano."
Panosteitis is a self-limiting inflammatory condition that causes pain in the long bones during periods of rapid growth. It looks scary the first time you see it. The good news is that it almost always resolves on its own without any lasting joint damage.
This guide explains what Pano is, why we see it occasionally in our lines, what you can do to support your puppy through it, and most importantly, the steps you can take to reduce the risk in the first place.
What Pano Is, and Why Some Doodles Are at Risk
Panosteitis typically affects dogs between 5 and 18 months old. It causes inflammation within the bone marrow of the long bones, leading to sudden, shifting lameness that often resolves on its own by the time the dog reaches 18 to 24 months of age.
Doodle crosses with Golden Retriever, Labrador, or Bernese Mountain Dog lineage tend to grow quickly during adolescence, and rapid growth is one of the documented contributors to Pano. This is part of why the condition shows up more often in retriever-influenced breeds than in smaller doodle crosses.
What we have learned from our own program, however, is that genetics alone does not cause Pano. The trigger appears to be the interaction between genetic predisposition and environmental factors during the growth window — specifically nutrition.
What We Have Learned at Stokeshire
We have placed hundreds of puppies. We have observed isolated cases of Pano in our retriever-influenced lines. In every case we have documented, the affected puppy was being fed a Large Breed Puppy formula or a high-calorie diet during the growth window.
This is a small sample. We are careful not to overstate it. But the pattern has been consistent enough that we feel a responsibility to share what we have learned with every Stokeshire family.
The takeaway: Pano is not entirely preventable, but the risk appears to be significantly reduced when puppies are fed appropriately for their actual projected adult size during the critical 5 to 18 month growth window.
Why Large Breed Puppy Formula Can Backfire for Medium-Sized Doodles
This is the most important and least understood part of the story.
Large Breed Puppy formulas are calibrated for dogs that will mature at 70 pounds or more — Great Pyrenees, Bernese Mountain Dogs, Labrador Retrievers, and similar large breeds. They are designed to support a slow, prolonged growth curve that does not finish closing until around 18 months.
Stokeshire breeds medium-sized doodles. Most of our puppies will mature at 35 to 55 pounds. They have a faster, shorter growth curve and their nutritional needs during development are calibrated differently than a 90-pound adult dog.
When a medium-sized doodle is fed a Large Breed Puppy formula, the protein-to-fat ratio, caloric density, and mineral content are mismatched to the puppy's actual development. In our experience, this mismatch contributes to the rapid growth spurts and inflammatory response that present as Pano.
Most generalist veterinarians default to recommending Large Breed Puppy formula for any doodle that looks like it might mature at over 30 pounds. This is well-intentioned but, in our experience, it has been the single most common factor in the Pano cases we have seen. We strongly encourage families to speak with us before making any food change recommended by a veterinarian.
What We Recommend
Every Stokeshire puppy goes home on Diamond Naturals Skin & Coat Real Salmon and Potato Formula. We recommend continuing this food through the growth window and into adulthood.
Why this specific formula:
AAFCO-approved for All Life Stages including growth of large size dogs, which means the calcium content meets the maximum ceiling established to protect growing puppies
Real salmon as the first ingredient, providing sustained omega-3 intake that supports doodle coat health
All Life Stages designation means no food transition is required as your puppy matures
Family-owned American manufacturer with a clean recall record on the Naturals line for over a decade
We have no financial relationship with Diamond. We do not earn affiliate revenue or sponsorship. We feed it because it has worked consistently across hundreds of puppies in our program.
For the full reasoning on why we recommend this food and how to evaluate alternatives, see our complete nutrition guide: https://www.wisconsindesignerdoodles.com/stokeshire-doodle-puppy-blog/wrong-food-doodle-puppy-vet-recommendation
Symptoms of Panosteitis
If your puppy is between 5 and 18 months old and you notice any of the following, Pano is one possibility worth discussing with your vet:
Limping that shifts from leg to leg over days or weeks
Pain when limbs are touched, especially near the long bones
Decreased activity and reluctance to walk or play
Appetite loss or behavioral changes
Seeking comfort or becoming more clingy than usual
Symptoms often come and go over weeks, which is part of what makes Pano confusing for both owners and vets. Track changes over time and bring notes to your veterinary appointment.
Diagnosis
Your veterinarian may:
Perform a physical exam to locate the source of pain
Use radiographs (X-rays) to detect increased bone density, which is a hallmark sign of Pano
Rule out other conditions like hip dysplasia, fractures, or developmental orthopedic disease through imaging
Pano is sometimes a diagnosis of exclusion, meaning your vet may want to rule out more serious conditions first. This is appropriate. We always recommend following your vet's diagnostic protocol.
Treatment
While Panosteitis resolves on its own, managing pain and limiting activity during flare-ups is important:
Pain relief. Your vet may prescribe NSAIDs such as Carprofen or Meloxicam during active flare-ups
Rest. Avoid jumping, running, and long walks during periods of active pain
Comfort. Orthopedic beds and warm compresses help ease discomfort
Nutrition. Stay on the formulated diet that matches your puppy's projected adult size — for Stokeshire puppies, this means continuing Diamond Naturals Skin & Coat. Do not switch to a Large Breed formula in response to a Pano diagnosis. This is a common but counterproductive recommendation.
What You Can Do to Reduce the Risk
Based on what we have learned across our program:
Stay on the food we send your puppy home with through at least 18 months of age
Avoid Large Breed Puppy formulas unless your puppy is intentionally on track to mature at 70 pounds or more
Avoid calcium supplements of any kind, including bone meal, eggshell powder, multivitamins containing calcium, and any product marketed for "bone health" or "joint support" in puppies
Maintain lean body condition throughout the growth window — target a body condition score of approximately 4 out of 9, with visible waist, palpable ribs under light pressure, and visible abdominal tuck
Match exercise to skeletal readiness, not energy level. Free play on soft surfaces is appropriate. Sustained running on pavement, repetitive jumping, and long-distance hiking should wait until growth plates close
Stay consistent with vet checkups so any developing concerns are caught early
A Note on Pano and Hip Dysplasia
In some cases, inflammation from Pano can mimic the early signs of mild hip dysplasia on imaging. This can be alarming the first time you see it on a radiograph report. It does not necessarily mean a long-term joint issue is developing.
As your puppy's growth stabilizes and the inflammation resolves, these symptoms typically subside entirely. We recommend reassessment over time before drawing conclusions about a permanent condition. If you receive a hip dysplasia mention on a radiograph during a Pano flare-up, contact us before making any major decisions about your puppy's care or future.
Why Pano Is Not Covered Under Our Health Guarantee
At Stokeshire, we are deeply committed to breeding healthy, well-rounded puppies. However, Panosteitis is a developmental condition that is self-limiting and resolves without long-term joint damage or impact on life expectancy.
Because Pano does not materially impair the dog's long-term quality of life — the standard for guarantee coverage under our 3-Year Health and Wellness Partnership — it is not covered under the guarantee for refund, replacement, or veterinary expense reimbursement. Adherence to our nutritional guidance, including the avoidance of Large Breed Puppy formulas during the growth window, is a material condition of guarantee coverage for any orthopedic concern arising during the first 18 months.
This is consistent with our broader philosophy: the guarantee exists to support families through serious, life-affecting conditions. Pano, while uncomfortable for the puppy and stressful for the family, falls into a different category — one where rest, appropriate nutrition, pain management during flare-ups, and time are the right interventions.
The Stokeshire Framing
Our position on this is straightforward.
Genetics load the gun. Environment pulls the trigger.
Stokeshire manages the upstream genetic variables we can influence: structural parent screening, multi-breed crossbreeding to broaden the genetic foundation, coefficient of inbreeding management, and controlled neonatal nutrition during the first eight weeks.
The downstream environmental variables — the ones that determine whether genetic predisposition becomes a clinical Pano episode — are largely controlled by the home: nutrition, body condition, and exercise during growth.
Both matter. Neither alone is sufficient.
Conclusion
Pano can be a tough phase, but it is temporary. With rest, appropriate nutrition, and supportive care, your Doodle will move through this season and into a healthy adulthood without lasting effects.
We share what we have learned because we want every Stokeshire puppy to thrive across the full arc of their life, not just the first few weeks at home. If you have questions about your puppy's food, weight, exercise, or any sign of orthopedic discomfort during the first 18 months, please reach out. We would always rather have that conversation early than try to solve something later.
Warmly, James & Katie Stokeshire Designer Doodles
References: Weir, M., Hunter, T., & Yuill, C. (n.d.). Panosteitis in Dogs. VCA Animal Hospitals. https://vcahospitals.com/know-your-pet/panosteitis-in-dogs