Hi Kevinh219 –
It sounds like you have a knowledgeable vet – it’s always nice to see a vet recommending a more species-appropriate diet rather than the big name veterinary brands like Science Diet and Purina. 🙂
Rather than looking for a food that has all of these items, I’d suggest just finding a few grain-free puppy foods with over 30% protein that you like and adding the glucosamine, chondroitin and L-carnitine separately. Most supplements present in commercial foods are just for marketing anyways, the food rarely contains high enough levels to have any therapeutic effect. Glucosamine, chondroitin and L-carnitine can all be purchased from human supplement stores/websites – Swanson Vitamins has great prices. Just check with your vet to get recommended dosages.
