This is defect in the cartilage the overlaying or attaching to the bone does not take place properly and a small piece or flap peels up and acts as an irritant. Sometimes surgery to remove the piece of cartilage is the only option. Discuss this with an Orthopedics veterinarian if surgery is a possibility. Of those cases all were fed the same 3 commercial dog foods . When it is nutritionally cause is it often in more than one joint.
Breeders have a tendancy to stick their head in the sand.
It is the least invasive and least threatening of the three bone diseases discussed in this article. Excessive feeding can actually alter the length of bone and shape of muscle making an animal unsound in their development. The following 3 diseases are difficult to diagnose at times. It requires looking at a total history of the animal, including feeding, medications, vaccines, injuries, surgeries etc. I hope this method of discussing these problems makes it a little easier to understand and helps you find a solution, when and if you have these problems.