Panosteitis, or simply 'Pano', affects young dogs of large breeds. It usually affects dogs between the ages of 6 months and 16 months old. The condition appears spontaneously and is limited to the duration of growth - once the dog stops growing, the condition stops, whether it is treated or not. That is why it is occasionally referred to as 'growing pains'.
The condition causes bone inflammation, primarily of the long bones, and may involve a single or multiple bones. The exact cause is unknown, but genetics, stress, infection, or the dogs own metabolic and immune responses may play a role.
Affected dogs are intermittently lame, with the lameness shifting from one leg to another. The dog can also have a fever, reduced appetite and the bones affected can be painful when handled.
A vet will diagnose Panesteitis with an X-ray and will prescribe medication to relieve pain. Although it is uncertain whether diets high in protein and calories or dietary supplementation play a role in the development of this condition, it is suggested that such diets be avoided in young, growing dogs. Merck Manual, 2020