I can't find a link, and the date stamps on the photos are from 2004, so I can't really validate this, but on tumblr the story is that the tiger's cubs died and she went into a terrible funk, wouldn't eat, the whole bit. So, the zookeepers dressed up some piglets in 'tiger cloth' (?) and the tiger started treating the piglets like her own babies, mothering them and feeding them and telling them to stand up straight and asking why are they always 'text mailing' their friends and why can't they, just once, walk the dog, for pete's sake? Anyway, if it's all an Internet ruse, it's a nicer one than most. #sappy.