EF carries the Fashionistas small bunny tail butt plug
, but I'm not a big fan of the texture.
The one from Crystal Delights is much nicer looking and feeling (and more expensive):
Stockroom dot com carries one that looks nice:
What we really need is someone in the industry to make an entire line of modular tails and butt plugs, that way you could choose what tail you wanted, and just attach it to whatever type of butt plug you want. It would make a killing a the furry conventions.
I'm a fan of the bunny ones, but just because I think they are cute. It's not a furry thing.