I have a cage of four male rats and three female rats. I'm thinking of trying to breed just one female to start so was thinking of putting one of the females in with the males for a week or so then moving her back to the female cage to have her babies. Do you see any problems with that? Is four males too many? They are young rats, just barely reaching breeding size, about 250 grams for the females. Don't really want to separate them into another cage if I don't have to. I was actually thinking of rotating my females into the male cage a couple weeks apart and then moving them back into the female cage, then moving them to their own separate cage for birthing and raising young. Thoughts?