i dont think it looks like a bent leg at all. if you take a close look at the actual cataloge. it is totally a penis. and it doesnt make any sense. dogs don't have penis's like that.
the rep for ikea says it is the dogs leg, but if you read this article, and probably if you look up more articles on this subject you'll find its not the first time ikea has had some weird things in their cataloge. i love ikea none the less i just think this is halarious.