In tree and field kangaroos, the abdomen is large, and contains infectious bacteria capable of destroying tough fibrous food.
The digestive process is similar to the digestive process of a cow, although the anatomy is different.
The main food kangaroo boil down to the leaves and fruits. Also, some of them eat bark of trees, juice and flowers. When kangaroos can not get their usual herbal food, they eat eggs of birds and other small animals.
There are three general types of earthly kangaroos, wallabies, wallaroos, and ordinary kangaroos.