Horses have always been popular working animals in the United States, although the combustion engine and other modern forms of “horse power” have in many instances replaced them in our streets and fields. But today, horses are more popular than ever before, with American Veterinary Medical Association survey data showing we owned more than 7 million horses in 2006, nearly double the amount from 1996. Dr. Lydia Gray, an equine veterinarian from Elburn, Ill., and member of the AVMA Council on Communications, talks about horses and offers advice on how to determine if a horse is right for you.