I agree with Pigfish (hiya pigfish!) - guinea pigs looks nothing like hamsters. Guinea pigs are fat, round and furry - like wigs with little legs. They do not have a tail. Hamsters are small, squarer with little legs and funny little pink tails. They also have big eyes. I made a crap guinea pig once (he is on my site at elgyfu.co.uk if anyone feels sorry enough for him to give him a home - he has the hole in the bottom syndrome too). I did try turning the mouse into a hamster but it just would not look like it.