I have a pet rat who is about 18 months old, yesterday I noticed that her left front paw is swollen and she is keeping it hitched up. If she knocks it it isn't really bothering her but she is not using it at all. It is slightly red but very swollen to about 3 times its normal size. Any idea what it could be, is it common or do you think I need to take her to see somebody? Thanks.


