Hi, what size/age do RATS start breeding?

I just witnessed the two MICE that I am fattening up do the sex act, and the RAT shop in town (only one) is going out of business this month. I think I will get some and try to breed. What size/age do RATS (not mice) start breeding?

about 8 weeks I belive I had my forst litter a few days ago of 16 pups I think htey are a bot easier than mice to breed my mice are going to be culled.

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Live for today Not tomorrow.

Thanks. And at what size are they usually at the 8 week mark?

i'd say about eight weeks aswell. and like mice, rats can mate and become pregnant again on the day they give birth.

also, if a female rat doesen't breed withen 6 months of being born, it wont be able to breed at all. thier pelvis will fuse shut.

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i'd be better off opening my own small zoo.