Even hippos need some tooth-brushing. For the animals who live in the wildness things are much easier. They manage to find some herbs and similar things to clean their teeth, but what is with the animals who are in captivity? Well, than someone should do it for them. If you ever wondered how to toothbrush a hippo, well, here are some photos which will give you all the answers. As I can see it, this hippo really enjoys washing his teeth.