Hi, I have three rats that I adopted recently from my college. I've had rats before and feel pretty experienced, but I have no idea what's going on with my girl Max. She has what looks like a ring of black around her bottom teeth, she can't close her mouth and she isn't eating much. She is drooling and her fur is dirty because she hasn't been able to wash. Please help me figure out what's wrong with her!!! sorry i know these pictures aren't the best she's not happy and is squirming, help me please!