hello, I bought 4 mice two weeks ago. I bought them when they were 6 weeks old. Three females and a male. Im not sure if one of my females is pregnant or not. She is acting differently to the others. I've noticed that she is a lot fatter than the other females. She has been using the bedding and sawdust to make little beds around the cage. She doesn't sleep with the other mice she has made a little bed just outside the coconut that the others hide but she does sleep with the male. I've seen the male carry food to the female before. It was really cute :). Anyway, does anyone have advice? Also when are they sexually mature? And lastly, this is my first forum ever!