Thanks guys. I'll thaw the rat longer next time and keep checking the husbandry. As for her weight. She seems really small to me. Not skinny, just small. She has no reason to be dehydrated since the humidity never drops below 50% and she has 2 water bowls in her cage. There are things I don't understand though like why she has only shed once since I got her. I thought she was going to shed a month ago but I never found a shed in her cage. I give her monthly baths and feed her every week but she has not grown a lot.