Animals in zoos are on a mission to disgust and horrify humans. So many examples (ie monkey fills own mouth with piss). Panda rejects twin and then crushes accepted cub is only one.

Ostrich Attacks Kid!

Here is a photo the painting I made today of the currently famous youtube video "Ostrich Attacks Kid" uploaded by one VRSick714. A few liberties were taken.
Observe real life cinematic arrangements:

Well isn't my butt red

Today, at a zoo in South Carolina, a daddy baboon grabbed and threw its baby baboon right after it was born while 50 zoogoers watched. Nature isn't all cute fun and games, is it? Watch the baby baboon die, damn you.
http://www.thestate.com/2010/04/05/1230788/newborn-baboon-at-riverbanks-mauled.html