 A 2004 survey by the UK Kennel Club puts this number at 38.8%.Although most puppies are screened for the disorders before being sold (by reputable breeders), hip and elbow dysplasia afflict one-fifth of dogs.Eye diseases are also possible in the breed; cataracts are the most common eye disease, but they can also be afflicted with progressive retinal atrophy, glaucoma, distichiasis, entropion, corneal dystrophy, and retinal dysplasia.