fighting mice

Question
Hello I recently got a female mouse to join my other girls one mouse has started fighting so have no separated her from the group my mouse that got caught up in the attack is now very cold and in a haunch position not very active refusing food and water could it be that she's in pain

Answer
Hi Sarah,

Yes, it sounds very much like the mouse that is hunching is in pain.  Do you have a local vet who works with pocket pets like mice that can see her as soon as possible?  Keep the injured mouse separate from the others for the time being so she can heal and so you can observe her as closely as possible.

You can place a heating pad on its lowest "warm" setting underneath her enclosure to keep her from chilling, but if she is losing body heat, something quite serious is wrong.  Check her all over - do you see any scabs, bumps, lumps, missing fur, or broken skin that can help you figure out in what way she is injured?

Her best bet is to see a vet as fast as is possible.  Please let me know if there is anything else I can do.

Best of luck,
-Tam