Animals will often chew plants to get some roughage. For dogs this is because they are omnivores and actually enjoy plant foods. Plant roughage can be a good source of vitamins and can be helpful for passing food through the intestines. Cats are strictly carnivorous, but eating plants can benefit them by helping to bind hair in the stomach and carry it back out when they hack the hair out through their esophagus and mouth. However, animals also eat leaves for reasons we do no