I am trying to draw up a plan for a breeding rack and was wondering which size tub would be better to breed a few rats in. The Sterilite 1844 20 Qt tub is about 11X16 and about 9 inches deep. The Sterilite 1854 12 Qt tub is 11X16 as well but only about 5.5 inches deep. Can I breed a male and two females in the larger tub and move preg females to the smaller tub until after the offspring are weaned? After that I would sort the young by sex and put them in either the larger or smaller tubs according to size, and of course use some as feeders and freeze some. Any suggestions would be great!