due to the recent death of our beloved ancient gerbil,we have decided to rehome another small furry. im not wanting to take on more gerbils, and have instead decided on mice. i have found some in need of a new home, and we are going to see them tomorrow, there are around 40 babies to choose from, and im looking for a female only tank. the tank is 3 feet long x 1 foot wide. i was thinking 5/6 will be about right but im not sure. we have had mice before, but i dont want to overcrowd them so i need to know how many will comfortably be housed in this tank. any info greatly appreciated, thanks.