This video, taken recently at a zoo in Baghdad, show nine lions attacking, killing, and eating 2 donkeys in front of a crowd of onlookers. This seems to be common practice in Iraqi zoos as is seen in this 2005 article from the St. Petersburg Times.

Article: In Baghdad, where there is too little food and too much gunfire, what do you feed 19 lions?

"Donkeys," Lawrence Anthony says. "I send people out to buy donkeys, three a day if we can find them. With 19 lions, it takes three donkeys a day."