Thanks a lot Tom ! When you say I should have 1.1 in four tubs, do you mean I never should pick out the male and let them breed all the time?

Also for you guys who suggested to buy a rat rack: we don't have those things where I live. It's the same thing when it comes to snake racks. Seriously, swedes buy their racks in ikea. Pretty sad

I was thinking that 1 litter each week should be good. Thanks !