I'm looking into small-scale rat breeding for feeders (and fun since I enjoy the rats themselves). Just wondering which of these would the best option, or if there's anything better:

1) 2 tubs; 1.1 breeding pair in one, 0.2 in the other to keep each other company while they wait their "turn" to breed, so to speak. I'm trying to rotate females so they each get a break, and have enough rats that they're never alone. Pregnant female will be moved back into the female tub while the next one is rotated into the breeding tub.

2) 2 tubs; 3.0 "male" tub and 0.2 "female" tub. 1 male gets put in with the females until they're ready to pop, then transferred back to the bachelor tub. So the female tub is communal, and the males are never by themselves.

For reference, I intend to euth feeders around sexual maturity, which is a bit after weaning, so they should be safe to live in the designated gender tub, eliminating the need for a grow out tub. Is this feasible?