Lets see what does Tree Kangaroos eat

Fruit, leaves, fruit, sap, eggs and bark.

Many did not know that Tree Kangaroos are considered herbivores, although they will feed upon animals. The main portion of their diet consists of leaves, but they will also feed upon flowers, fruits, nuts, bark, sap, bird eggs, bird young, and insects. In the zoo they are fed fruit leaves, apples, carrots, corn, kale, timothy hay, spinach leaves, alfalfa, lettuce, celery, and hard-boiled eggs. They are also fed with tea leaves to make up for the tannin present in the leaves they eat in the wild. Without these leaves, the rich colours of the coat would dull.