Rats and mice and ASFS will never interbreed.

But ASFs are very flexible with who they are housed with. I've kept them with Mice, and Spiny mice with no trouble at all. Rats, I don't know about but I supposed if they grow up together, they'll probably be fine.

I mean, I've seen someone who has a male mouse living with two female degus quite happily. So anything can happen if you ask me.