Hi Brian –
I would suggest controlling calcium levels until the dog is at least 8 months old.
“Canine hip dysplasia (CHD) is the most frequently encountered orthopedic disease in veterinary medicine practice. This extremely common heritable disorder of the growing dog can be influenced by nutrition. The period from 3 to 8 months of age appears to be important in the development of CHD, with the first 6 months generally thought to be the most critical.”
Skeletal Diseases of the Growing Dog by Daniel C. Richardson DVM
