"Tripe" refers to the stomach of a ruminant (grass eating) animal. "Green" refers to the fact that the tripe is not bleached, scalded or processed in any way. Tripe is an excellent source of fat, enzymes, vitamins with a perfect balance of phosphorous and calcium. Green tripe has the additional benefit of providing good bacteria, which aids in digestion. Unfortunately, tripe has a distinctive odor that is not pleasant. You may not love it, but your dog will!