The Skinny Pig is an almost hairless breed of Guinea pig. Skinny pigs typically have hair on their muzzles, feet, and legs, but are hairless over the remainder of their bodies. Some of them have a thin covering of fuzzy hair on their backs as well. A healthy Skinny has skin that is mostly smooth with some wrinkling around the legs and neck, the body is full with no appearance of spine or ribs.

Skinnies can come in a variety of colours and patterns, such as Dutch, Tortoiseshell, Himalayan and many others. "Skinny" is the term used for hairless guinea pigs to describe the illusion of their visually thinner appearance, or colloquially referring to the exposed skin of the animal.

The modern Skinny Pig breed originated with a cross between haired guinea pigs and a hairless lab strain.

More Info: en.wikipedia.org