New York chiropractor Doug Willen says some of his favorite clients are the ones from the animal kingdom. Dr. Willen claims he is helping animals by giving them adjustments. However, one veterinarian disagrees and states there is no science behind animal chiropractics. Although he acknowledges he is not a licensed veterinarian, Dr. Willen says he is board-certified through the American Veterinary Chiropractic Association to work on animals. Inside Edition’s Lisa Guerrero has more.