Baldwin

Guinea Pig

The Baldwin was a spontaneous mutation from White Crested cavies belonging to a Californian cavy fancier who was breeding them for show. Baldwins are born with a full coat which falls out until they are bald. The Baldwin is characterized by numerous skin wrinkles and a very small amount of hair just on the feet only. The Skinny and the Baldwin are two separate breeds and the two different hairless genes are not compatible. Hairless breeds require special accommodation, as they need to be kept warm and may require extra food. Currently the UK bodies admits hairless breeds on to the show table, and consequently a standard of perfection exists.

Source: http://en.wikipedia.org/wiki/Guinea_pig_breed#Hairless_breeds