Hey guuys, silly me... I made a rat breeding rack full of 90 qt sterilite tubs a couple of days ago and loaded them up with 1:4 rats... Anyways, I COMPLETELY FORGOT ABOUT THE MARTERNITY/NURSING TANKS! Well, none are pregnant yet but most of the rats are already adults so I need your help on this question:

I'm building a rack for the nursery again.. What kind of tub should i use for the pregnant mother and her woul be offspring? o.o Please be specific on the size! Also, what do you guys recommend so i could avoid them chew outs? Thank you!