I'm a bit confused right now.
I have 4 young females housed together who had a male in with them until about 5 weeks ago. They all (or so I thought) dropped litters around the 12-14th November. There were over 20 babies which the mothers have now weaned. Today I went to check on them as some of the babies will be going to new homes in the next week or so, and there was a litter of day-old pinks. They weren't there yesterday!
I know mice can have slightly longer gestations depending on conditions, but the others gave birth 3 weeks ago and they have not been with a male for 5 weeks, as I removed him as soon as the does started to look pregnant.
I guess the litter speaks for itself and that doe must have had an extended pregnancy, but does this happen often?
I have 4 young females housed together who had a male in with them until about 5 weeks ago. They all (or so I thought) dropped litters around the 12-14th November. There were over 20 babies which the mothers have now weaned. Today I went to check on them as some of the babies will be going to new homes in the next week or so, and there was a litter of day-old pinks. They weren't there yesterday!
I know mice can have slightly longer gestations depending on conditions, but the others gave birth 3 weeks ago and they have not been with a male for 5 weeks, as I removed him as soon as the does started to look pregnant.
I guess the litter speaks for itself and that doe must have had an extended pregnancy, but does this happen often?