We kept the pairs together until the pups are weaned. Some of the pups died and were eaten by the adult mice. What can we do to take care of the new born pups?
I may have a suggestion for you. Once you see a pregnant female, you can separate her into a new cage. She will give births in peace. When the pups are weaned, you can put back this female mouse to the breeding. What do you think about it?
This time is about female mice that have for the second time pups. They ate almost all the pups. We used 3 females and 1 male per cage. Is it ok to keep the male inside the cage until the pups are weaned?
It is preferred to remove the male from the cage until all pups are weaned (and allow the females to 'rest' and to suckle their young) then to return the male to the cage for continuous breeding. Some Nude and inbred starins have high incidences of cannabalism, often the first few litters, but with some it can include whole litters being eaten.