In general, these are healthy animals with good immunity. However, the American Bulldog may still be prone to:1.Cataract, demodicosis, and hypothyroidism.2.The breed can develop hip or elbow dysplasia, especially if dogs gain weight too quickly in the first two years.3.Some American Bulldogs may suffer from brachycephalic syndrome and find it difficult to cope with hot weather. Dogs with white or mostly white coats are more prone to sunburn and possibly skin cancer (in rare cases). A protective cream for dogs when they are outside for a long time can help.