Japanese Bobtail

Cat

The Japanese Bobtail is a breed of domestic cat with an unusual "bobbed" tail more closely resembling the tail of a rabbit than that of other cats. The short tail is a body-type mutation caused by a recessive gene.[1] The variety is native to Japan and Southeast Asia, though it is now found throughout the world. The breed has been known in Japan for centuries, and it frequently appears in traditional folklore and art.

http://en.wikipedia.org/wiki/Japanese_Bobtail