Last week i acquired two female mice that had just finished weaning off their mother. I got them off a breeder and he checked the sexes thouroughly as i wanted two females. They were similar in size but nearly a week later one is double the size of the other one, hopefully you can see this in the picture i have attached. My question is......is this normal?.
The bigger mouse is always eating and very active while the other one mostly stays in her wee house. I owned a mouse before but never sisters, that's why i joined today to seek advice from friendly caring mouse owners. i handle both mice daily but only for a few seconds as they are still young. Ay help/advice on the size question would be most helpful.