Do you keep track of your rat's family tree? I plan on keeping a detailed family tree of all my rats, that way I know who is related to who and how closely. So, here is a question. How far back can you trace your latest litter?
For me, I can trace my current litter back to their parents since its my first time breeding rats. You can do this for mice too, if you don't breed rats. Just thought this would be something fun.