Recently (within the past 2 weeks or so), touching my cat's hindquarters has resulted in him frantically biting his (FRONT) paws. I noticed it for the first time when I was petting him while he was sitting (he looked like a drinky bird). Also, if he can't reach his paws (I'm in the way or something), he'll bite whatever is in reach.
The biting isn't a problem (he had stomatitis so badly that we had his teeth removed), but I can't figure out what's causing this behavior (and the other 3 cats don't do it). Has anyone ever seen this before?
Update: After a few weeks all of our cats developed this behavior.