Hi. My name is G. I like mice and am considering liking rats. I own two American parakeets (dimestore variety) Cookies and Crackers, Two 10-gallon aquariums and three mice which I keep on my desk. Cookies’ cage is at my elbow at my desk because she’s in the process of getting used to me. Crackers lives in the living room where he can look out the window, sit beside me when I read, and enjoy the sounds of the piano. I just joined about an hour ago. Got the mice last week, but have had lots of pet mice before. I want to know how many days baby mice stay in the popcorn, or hopper stage. Can someone tell me? Thanks.