Photo Gallery: Germany's Latest Four-Legged Sensation 01/07/2011
 The reasons for Heidi's crossed eyes are unclear, but zoo officials speculate...
dpa

The reasons for Heidi's crossed eyes are unclear, but zoo officials speculate they might have been caused by fat deposits behind the eyes, resulting from her poor diet early in life. They don't cause her pain, and she is easily able to get around, zoo officials say.