so i have two females and one of them was very pregnant, the other looked a little chubby but not necessarily pregnant. this morning there were 15 little babies in there in a big pile with both mice nursing. the last time they were pregnant they had their babies on the same nite and both definitely looked pregnant.
the questions are... do mice usually have their babies on the same nite??
and, if not, could one mouse have 15 babies?