Camel
Camels are ruminants, which have a two-part cycle in their eating. The first stomach ferments the food for a time. Then, this food (or cud) returns to the camel's mouth, and the camel chews it again. Then the camel swallows the cud and it goes to the other parts of the stomach to be completely digested. The digestion is done mainly by microorganisms in the stomachs.