Himalayan

The Himalayan Guinea pig is similar to the Siamese cat in coat. It is solid white for the first few weeks after birth. The ears, face, paws, and feet grow darker with age. Similar to Siamese cats, Himalayans' coat darkens depending on the temperature. If a Guinea pig lives in a house where the temperature is kept colder it will have darker points. If it is kept in a house where the temperature is warmer the points will be lighter and maybe even a medium brown. If kept outside the points' darkness would depend on the climate of the area. The darkest areas should be the face, paws, and the feet. Himalayans should have dark red eyes. These Guinea pigs originate in southeast Asia, similar to the Birman, Burmese, Himalayan, and Siamese cat breeds.

http://en.wikipedia.org/wiki/Abyssinian_guinea_pig#Abyssinian