Canine Hip Dysplasia
This disorder also has a hereditary basis, but the patterns of heredity are more difficult to predict than with the eye disorders. Parents certified free of hip Dysplasia may produce some puppies with this condition. Dogs with the condition should never be bred. Diagnosis can only be made by X-ray examinations. Environmental factors such as nutrition of young puppies and rearing practices can cause or increase the severity of the condition. Talk with your veterinarian for more detailed information.
Canine Hip Dysplasia is observed in all breeds with an adult weight greater than 35 pounds. The problem is in the development of the boney structures of the hip joint. In normal hip joints the femur (thigh bone) sits solidly in the acetabulum (cup of the pelvic bones). In hip dysplasia, loose ligaments allow the head of the femur to begin to work free as the puppy grows. Because of this joint laxity, there is abnormal wear and tear on the boney surfaces that touch resulting in the development of arthritis. This arthritis results in varying degrees of symptoms including pain and restricted movement.
The Orthopedic Foundation for Animals (OFA) will certify the X-rays of breeding dogs as normal and issue a certification number. The dog must be at least 2 years old to obtain an OFA certification. Ask to see these documents on both parents before purchasing a puppy.
The retina is a membrane which lines the back of the eye and contains the light receptors needed for vision. Progressive Retinal Atrophy (PRA) and Central Progressive Retinal Atrophy (CPRA) are diseases which progressively destroy these light receptors resulting in gradual loss of vision and blindness. Both PRA and CPRA are inherited conditions and have been documented in several breeds including Labrador Retrievers. Any dog having one of these diseases is capable of transmitting the disease to his offspring if mated with a dog carrying the trait for the disease. Fortunately, a simple eye examination at the proper age will diagnosis the condition. Reputable and informed breeders have their breeding dogs examined and certified through the Canine Eye Registry Foundation, Inc. (CERF) Ask to see the CERF certification on both parents of the litter before purchasing a puppy.
Source: Dog Owners Home Veterinary Handbook, Delbert Carlson, DVM and James Giffin, MD