okay so i got a new boy rat today, he is a few months old i think, anyway, while i sorted out a cage for him ( a small temporary cage ) i put my boys and him in the bath, they was fine, didnt fight, barley noticed him haha! and after that i put him in his cage and i put the cage next door tomy other rats cage, the other rats went into his cage ( which they seemed like giants in there haha! ) and was still fine with him, i will prob wait a few days to put them all in one cage tho... but what is the next step?