Nobody Beats the Drum — Natural Thing (by nobodybeatsthedrum)
Been neglecting the animal theme a bit. Was reminded to keep paying attention by Iskander (thanks!) This clip is like an alternate take on Pig Chase. I particularly like how the animals escape from their box at the end of the video.
I should mention these guys have a reputation for going a bit crazy on their videos. Have a look at this making of, for example.