My female rat last night must of hurt herself somehow because she has been favoring or not really walking on one of her hind legs. She does put some pressure on it. It doesnt look like it is swollen or red at all. She doesnt show any sign of pain either. She can itch herself a little with it. I called around to vets near by and none of them treat rats. It would be much appreciated if someone with knowledge of something like this can answer. If any more information is needed I would be happy to supply it.