New Mouse

Question
Hi,
I had 2 female mice and I have had them for a while now and decided to get another. My new one is much younger and smaller but the pet shop staff said that was okay because they will most likely take care of it like it was a child. I introduced them in neutral territory, I used vanilla extract and cleaned everything and they weren't fighting in the neutral territory. Then when they were in the cage my dominant female chased the new one around. There were squeaks but it nipped her. I checked for bites and blood but there was nothing. It has been like 5 hours and no more of that behavior. The other one cares for it like its own daughter. I was just wondering if I would expect anymore when it looks like it stopped.
Cheers.

Answer
Hi Katie,

Hopefully it won't continue, but it would be a good idea to keep your eye on them for a couple of days just to be safe.  Chasing is normal, and while the nipping is a little worrisome, the fact that there were no injuries and the cage has calmed is an excellent sign!  Usually all the scuffling settles down within the first 1-2 days.

Best of luck, and congratulations on your new friend!
-Tam