Carnivores are meat-eating animals. Most carnivores supplement their diet with insects and fruit, but unlike hoofed mammals, carnivores have simple digestive systems incapable of digesting grass cellulose. Felines occasionally eat grass to induce vomiting and cleanse their stomachs of hair-balls or bad food. Some domestic dogs occasionally eat grass, probably for the taste.
Carnivores are at the top of the food chain. They are fast, agile, and adapted for hunting animals lower on the food chain. Because they burn large amounts of calories, carnivores consume many smaller animals and keep the population of herbivores under control, promoting greener and healthier ecosystems.