About how long does an egg stay fertile after a roo is separated or gone?
If you will read enough, you will discover the answer to your question is somewhere between 4 days and 4 weeks! LOL
I've researched this for the correct answer...ALOT.
Even the "Highly educated chicken experts"...don't agree!
As GC stated though, the commonly accepted practice amongst breeders is 3-4 weeks.
If you are wanting to guarantee roo A's presence is no with your hens, they say to wait a month before introducing roo B. I wasn't going to incubate anymore this year but when my roo died, I thought I would try and see if he got lucky.
CG