mice do way better in pairs when they birth jo. so i would keep them together.

when i did breed mice years ago. i used a group of a few males and just moved them from tank to tank. each tank holding 1-3 females and i had no problems breeding at all.

when i tried to breed last year... i left the male in with the females and never had any luck at all. so i don't know why i couldn't seem to get any litters. seems like it was easy when i did it before. i have about 25 tanks of females... and bred mice like crazy (for an owl sanctuary).

best of luck to you and your mice!