Photo via The Daily Mail
Friendship is good for your health -- whether you're human or animal. Take this baby macaque, abandoned by its mother and close to death until it became best friends with a pigeon. The macaque is thriving and the pair are inseparable. But they aren't the only tear-jerking, unbelievable friendships you'll find in the animal world: From a sheep that brought a baby elephant out of a deep depression to natural enemies that snuggle down together for every nap, these 10 heartwarming relationships are incredible and unforgettable.