So an update for everyone. We have three mice that were likely ALREADY pregnant that are probably 4-5 days from birth. Our males are doing their diligence just the same. Our rats are a bit different, one female is a tad young yet to be pregnant but the male still take interest in her every few days as she cycles. The other female is pregnant now, she's not quite belly dragging yet but she's gotten plump on the back end. Also noted as the male doesn't take particular interest in her right now. So we have a week or so before we've got babies, and another week or two before we have feeders.
P.S. if you start a colony, prepurchase your feeders (not the breeders) for a two month supply, we only bought 6 and should have bought 20.