[BUG] Mastiff color-changing.

I'm not sure if anyone else has this happen (I didn't see another post on it) but my worgen's mastiff changes color when I change zones or dismiss/summon him. He'll go from black to pink to brown to gray to beige to purple (not in that order). At first I thought it was just different lighting, but I dismissed my black mastiff in an inn and immediately summoned him and got a beige one.

Kind of fun, but I'm not sure if it's intentional? It's certainly nice if no one can go back and ever tame another mastiff, because this way you get the whole range of them.