Cat grass (usually wheatgrass, oat grass, barley grass, or rye) is one of those things many cats love to chew, but why is it good for cats? 1. It’s a Digestive Aid Cats are obligate carnivores, but small amounts of plant material can help their digestion. Chewing grass may stimulate gastric motility and help cats move food or hairballs through their system. So yes, some scientists think it helps them puke. 2. Nutrient Source Cat grass contains folic acid! This helps cats with red blood cell prod