Some good articles on Patella Luxation & MEDIAL PATELLA LUXATION REPAIR (MPL) https://www.acvs.org/small-animal/patellar-luxations "Patellar luxation is one of the most common orthopedic conditions in dogs, diagnosed in 7% of puppies. The condition affects primarily small dogs, especially breeds such as Boston and Yorkshire terriers, Chihuahuas, Pomeranians, and miniature poodles. The incidence in large breed dogs has been on the rise over the past ten years, and breeds such