There are a few different factors that play a role in the development of canine hip dysplasia, a disease characterized by painful, uneven movements. A normal hip joint involves a tight-fitting ball and socket motion. In direct contrast, hip dysplasia concerns a malformed connection of the ball and socket that results in a loose joint. Over time, hip dysplasia causes painful wear and tear of the joint, or degenerative joint disease (osteoarthritis). The good news? It can be managed and treated.