Loading... Please wait...The two major categories of joint problems are developmental and degenerative problems. With developmental problems, you have things like hip or elbow dysplasia, where the joint does not develop correctly in a number of different ways.
Degenerative problems cover a number of areas. But the most common, and the most common cause of arthritis in dogs, is cruciate ligament problems, where the ligament is degenerating over time and causing instability and secondary osteoarthritis.
In general, increased size and weight is always a predisposer of joint problems. So the poster children for both developmental and degenerative problems are going to be the bigger dogs.