I've been talking with a couple friends about breeding rats with me all together we need around 100 pups a week. We are going to only breed for pups and continue to buy adults. The confusion comes in with resting the females. Since they are only going to be nursing the pups for 2 weeks or less do they need as long as a rat who nurses a rat for the full 5 weeks. Also is 4 to 1 the best female to male ratio or is 5 to 1 ok? I'm sure I have a few more questions but none are coming to mind. I just don't won't to get in over my head with out a floaty. Lol