Probably true but... *shrug*
I have more luck rotating than I did keeping colonies. My male (or maybe the females) killed the children when I didn't remove him. That was a long time ago.
I just started up a new set of tubs. I'd been buying frozen for a while but decided to start up breeding mice again. And this time I've been having luck with the rotation thing.
and I also have four different sizes available at all times this way. Instead of Just one group of births at a time.