Here is my situation. I had all my hens and two roos together all winter. So on the 29th of December, I took the roos out. On the 4th of January I put the correct roos with the hens I wanted to breed with. So with my calculations the eggs can be fertile for up to 10days from a breeding. So I know I can't collect eggs for at least 10 days after separating them. I also read that eggs are not fertile until 5-7 days after mating. So I figure that I can't collect eggs to incubate until about the 11th of jan. That would be 13 days after they were removed from exposure to both roos, and 6 days after they were exposed to the intended roos. Is this correct?????