For the same school assignment as I did the skulls for I drew this sideview of a guinea pig. It will actually be used twice in the assigment, yay! In one instance it's specifically meant to be a boar (male guinea pig). The colour is pretty genuine too, it's a dark-eyed gold.

Drawn rather simply, it's meant to get the image across and not be majorly artsy or pretty. ;)

Art © me
If you really feel like using it I don't mind, but please give credit.