Pretty much what the title says. A new rescue of mine has started curling her tongue when she sticks it out. I can't really explain it, so I took a video of it.

http://www.youtube.com/watch?v=j5sI2...ature=youtu.be

Sorry for my horrible commentary.
Anyway, as the vid says, I have no idea what caused this. There's nothing abnormal about her mouth, and she never did this when I first picked her up. Any ideas?