I posted this on another thread, but I figured maybe people who have accidental litters would know a little better if they can. I've been wanting to rearrange my rats play area and make it larger while adding their cages to it. If I do that though, they will be able to climb around on each other's cages while one plays and the other is inside. I of course wouldn't have the males and females together at any time, but could they mate through the cages when one is playing??