Dr. Marty has came up with a new treat to help your dog's first line of defense against harmful invaders. Dr. Marty Better Life Bites for Immune Health contains Dried Bovine Colostrum, that is the first form of milk produced immediately following birth. The ingredient is rich in nutrients for gut health and bio-actives that support the immune system. Shiitake mushrooms provide a source of vitamins and anti-inflammatory properties.