One of my female mice that we call white mouse gave birth to 7 babies two days ago. I have done tons of research, but have a question on her behavior. I have noticed that she tends to leave her nesting box quite often, sometimes she will lay outside of it and sleep. The babies are all alive and she has been nursing them the last 2 days. I was under the impression that when she had babies she would be with them at all times, except when getting food and water. Is it normal for her to roam the tank and leave the babies for up to thirty mins? Sorry if this is a dumb question, the babies seem fine im just confused on why she leaves them.