Thanks for writing all that, it's very interesting to find out your experiences with them. So what sort of size tank is about right for a pair and do you leave them together all the time or do you separate them like fancies? Also if you do leave them together how often do they have litters? Finally, when you do have to handle them, for example to move them or sex the babies, can you pick them up by the tail - I think I heard that they can shed their tails like gerbils?