Faith, a bipedal female dog, was born in December of 2002 with only three legs; two fully-developed hind legs and a deformed front leg, which was amputated soon after birth. Her owner, Jude Stringfellow, refused to have her put to sleep as the employees at the veterinary hospital indicated she should. Instead, using a spoon with peanut butter as an incentive, Jude taught Faith to hop and later walk on her two hind legs. Wikipedia
The definitive Wikipedia entry for Faith. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Faith_%28dog%29