You would do it the same as you would with any other rodent intoduction. I desent mine and put them in a nuetral cage together where they haven't got anything to get teretorial over. You scatter food all around the cage and only have a water bottle in there and food. Then after 2 weeks if all is well you introduce 2 of everything slowly into the cage. It can go pair shapped later though and I ended up having to seperate the one I introduced because she was bullying the babies.