Roo's had this little pink mark on his upper lip for about a week now. It doesn't seem to bother him - he's not licking it a lot or anything, he still eats and drinks plenty and acts normally. So it hasn't been a huge concern. Darrell said we could take him to the vet if it gets worse. Well, now it seems to be getting worse. But it still doesn't seem to be bothering him. Just so that I'm prepared... What do y'all think it is??