Known Breed Disorders
Dogs are subject to more than 350 genetic disorders that can affect the heart, eyes, skeletal structure, skin, hearing ability, and more. Some are single-gene diseases, meaning it takes only a single gene to turn them on, while others are polygenic, controlled by multiple genes. Environment and diet can sometimes play a role in the development of polygenic diseases, as in the case of hip dysplasia. Some of the most common hereditary diseases are various forms of heart disease, eye disease, orthopedic defects, deafness, epilepsy, bleeding disorders, and skin diseases. The following sections describe just a few of the hereditary diseases that can affect dogs.