I made a 6 tub rat rack last week and I just have 1.3 rats in a tub now. but Im trading a guy a small boa for about 30 med. rats and I want to keep and breed as many as I can without making a new rack. and I will just kill the rest but I wanted to know if I could do 6 groups of 1.4 in each of the 6 tubs and leave all the moms and dads of each 1.4 group in the same tub without taking the males and females out into there own tubs when they give birth and until the babies are weaned ? Thanks