I'm looking at getting a rat breeding colony going. I was going to build my own rack with watering system, but my time is already tight with building snake enclosures. I started shopping around and found the Freedom Breeder Rat Complete seems to be the most complete ready to go system around.

Here is a link to it: http://www.freedombreeder.com/cage.php?cageID=19

What I was wondering is how many breeding females will I be able to put in each tub. I plan on doing the 12 week rotation method with 12 of the tubs then using the remaining 9 tubs for different age feeders. I was hoping to get 3 females in each, but I don't think that will be enough room for 3 females to ween their young in. I am thinking two is a better number. Will that work in 21.5" deep X 16" wide X 7" tall tubs?

Thanks in advance!