Guinea pigs belong to the family Cavidae. Four digits on the forepaw and three digits on the hindpaw characterize Cavidae. Guinea pigs originate from the high planes of South America therefore they tolerate cold better than heat.
Sugar Gliders (Petaurus breviceps = tight rope walker, short head) are one of the newest additions to the world of fad pets. Published information on Sugar Gliders is sparse, but more is coming available as we continue to see them as pets/patients.
The African pigmy hedgehog (Atelerix albiventris) has become a very popular pet in the early 1990's. They were a fad that hit the 'get rich quick' crowd initially but now has a small but very loyal following.
Sebaceous glands are abundant along the dorsal surface of the guinea pig and around the anal opening. These sebaceous glands are testosterone dependent and the sebaceous secretions can be excessive in the adult male. May see clumping of hair and can lead to dermatitis in this region.