i have 2 older rats, sam and areo ( air-e-o ) and well, i went on cage calculator, and i could have another rat, i would like to get another boy realy, i have no big spare rat cages and not enough money to buy one, i have a smaller take and cage suitable for a baby tho... so i was wondering how i could introduce a young male to my older males, my boys are around 1 year to just over that, to a month and a half, and areo is older than sam by about 4 months i think