These guys are known as Catavans or Cat Caravans, they come in McEdit Schematics ready to be placed in any world.
There are 59 different cats to choose from, as well as one template cat so you can design your own.

These are for 1.8.7 loading in an older version might result in missing blocks.

McEdit is required to use these download here: [url=www.mcedit.net/ ]www.mcedit.net/
[/url](This was re-uploaded from my old account)