Hi I'm new to the forum, and my roommate and I got a couple pet mice. Little did we know the pet store had incorrectly sexed one of the mice and there was a male in the tank. One of the mice we got was very early in pregnancy and we couldn't tell when we got her. So three weeks later we were the proud owners of 3 new pinkies, 1 boy 2 girls. They're all grown and weaned, but we decided to keep one of the females, and sold the male and one female. Once they were about 3 weeks old we seperated the male, the females were all kept together, and about a week ago sold one female and the male. Hopper (the baby we kept) has lost almost half of her weight and all of her whiskers are pulled out, saw this last night. We researched and saw that it could be barbering so we seperated her but I'm almost thinking it could be anxiety since barbering usually also includes bald patches of fur. She also was still sleeping in the little group with the other two females, they weren't chasing each other either. If it's barbering I think we can help calm her, but if its anxiety what can I do to help calm her and hopefully put her back in a group.