Maybe they eat monkeys?
Playhouse Disney Little Einsteins Programme were featuring animals. I was posed a question. What is the giraffe eating? I answered leaves. Then a lion appeared. I asked, what do lions eat? Mii instantly thought of the giraffe! Of course it would have been pretty sadistic to hear that answer, especially when the previous screen showed the delightfully munching away giraffes. She choked and answered, urm... lions eat animals. I looked blankly at mummy for five seconds, before responding with, nooooo, they eat food.