I looked up her breeder who still has some of her siblings left and they are all small. Less than 350 grams at a year old. Do you think I should offer her maybe a third mouse every other week? She by no means feels skinny. I have had rescues in the pass and she is no where small like them. She is just a really slow grower. I even thought about maybe trying a tub for her alone to see if maybe she feels a little insecure in the tank. But I am not sure of that either.