LOL had that happen to me years ago when I fell for the "they are both boy rabbits" line (rotten kids of mine and their big sad eyes!). Lo and behold one day there were baby bunnies from my little "male". Needless to say Mr. Stud Bunny was off to the vet the next day for a wee nip and tuck....no more babies!
I have no idea what went wrong with the mice. I thought I had my husbandry down pretty good with them. Anyways, maybe I'm just too squeamish but after disturbing the last mother at her "meal" *gag* I've just given it up as a poor idea for me and am looking into bulk buying of frozen feeders.
~~Jo~~