Well... yeah. That would be the whole 'extremely rare' and 'hunted to near extinction' bits I mentioned before. Wanna see?
[He backed up, putting more distance between them before shifting. Nothing dramatic, just the important parts. The nails on his fingers turning to long, pointed, black claws. His eyes took on a more amber hue as his pupils became cat-like slits. After a few moments he turned back, still remaining at a distance.]
We're foxes. Not wolves. If I really wanted to differentiate I could probably have a tail or something.