When Should He Start Reproducing?

[amg20102006]

i had 2 female rats together for a couple days. I just got a male rat today so i can get babies for food. when should he start trying to mate with them? A fast response is not neccesary but appreciated.

[Shelby]

As soon as they come into heat.. which is every few days. The females may not accept him right away, so it could be a week or two before they are actually pregnant.