As i said on RFUK:
Hi,
Yes, you can keep Male multi's with female fancy mice and visa versa, and no they wont breed as they are a different species though in the same family.
I have kept Multi's and Fancy mice together very sucessfully with no problems, so you shouldnt have any!
Especially if its a lone male multi with some female fancies, or a lone male fancy with a group of female multi's! Its a great way to give them company without complications!
Ruth
Hope this helps!
