A founding father of integrative veterinary medicine, Dr. Marty Goldstein and his colleagues in South Salem, N.Y., have created a mecca for holistic care, offering hope to scores of previously hopeless animals (and their owners). Combining conventional medical training with cutting-edge alternative therapies, Dr. Marty’s deeply empathetic philosophy offers a vital example of how improving overall health rather than merely treating disease is transformative for all living things. As Goldstein and his staff interact with animals, the stakes are high, and it is often touch-and-go as the owners, some who have traveled great distances, struggle with the reality of whether or not their pets will live to see another day. “The Dog Doc” — from the director of “Buck” — poses a serious question about whether we are overmedicating our pets, our children, and ourselves, and offers an immersive view into a seldom-seen world to paint a complete picture of the dedication and joy of being a veterinarian.