The other day my eight month old male rat started squeaking a lot for no discernable reason. It seems to happen when I touch him in certain areas or when he moves in certain ways. I haven't been able to pinpoint exactly what area is hurting him, but sometimes it seems pretty bad- he squeaks and squawks just walking sometimes. His appetite seems fine, but he doesn't seem to have a lot of energy. I'm hoping it's just a sprain or something and it will pass, but I'm considering trying to get him into the vet. Any thoughts?