Yeah, now we (me and my wife  evange) have 4 rats, all females.
But a day ago I realized..that one gray rat (this!) is suddenly ..male. Had to buy little individual cage. Oh, hope no one from our girls is pregnant =O_O=
This mistake was made in a pet shop.. I dunno how they couldn't notice that he was male.
My mom said "you need to find him another home" but I can't, I will buy him a male rat friend later, and a bigger cage.

So, their names are Koritza (Cinnamon), Mokko, Rena and..male is Raymond.
they have already grown up a little bit! wow.