AKA Human vs Herbivore The digestive system of an herbivorous animal. Herbivores are animals that eat an all-plant diet including grass, twigs, leaves, bark, fruit, and roots. The world is populated by a variety of herbivorous animals (wild and domestic) such as elephants, zebras, rhinos, and giraffes and cows, pigs, horses, chickens, sheep, and goats. […]