This is Smoothie the bald squirrel:
Smoothie was found in a town in England called Amersham back in July 2008. He was completely bald except for a few tufts of hair on his tail. Veterinarians at St. Tiggywinkles Wildlife Hospital tried to determine why the squirrel was bald, despite his having no discernible physical illness or condition such as mange. While running their tests and trying to encourage his coat to grow, they have kept him warm and fed him on a diet of pecans, which doesn't sound like a bad life for a bald squirrel.
And by the way, yes, the name of that wildlife hospital really is St. Tiggywinkles. Despite the almost disturbingly silly name, it is the largest and busiest wildlife hospital in the world. It looks like they do wonderful work, and if you have the means and want to help them out, you can do so at their website.