When it comes to making decisions about health issues for pets, veterinarian John de Jong reminds owners that veterinarians use factual, scientific information to make decisions about appropriate care for pets, and he says they are the experts on animal health. In an example, Dr. de Jong explains why one breeder's claim that vaccines cause hypertrophic osteodystrophy is inaccurate. Dr. de Jong says vaccines help animals live longer, healthier lives.