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Thanks i have two roosters and they both mate will all hens so is it possible that hen take sperms from both roosters or she Will always reject sperm from one

So, there are 2 oposite theories one is that after mateing sperm travel 10 days, so only after 10 days after mateing she Will lay fertile eggs and second theories that say that after 30to 48 hours after mateing she Will lay fertile eggs.. so wich one is right one?