I got three laying SL wyanndottes yesterday, and at their previous home they were housed with a couple or three quite randy roosters. Now they're here, in quarantine, with no rooster within ... erm ... randy distance. Just got them here yesterday afternoon, and I was shocked to go out and find an egg a few minutes ago. The first egg ever here! Not, technically, my egg, I don't think, since these girls were laying when I got them, but still - an egg! My other chickens, my first chickens, are 12 and 9 weeks old, and 7/13 of them are roosters and destined for freezer camp. Coincidentally, I also bought an incubator yesterday. I had planned on getting it all buffed up and then doing a couple of test run hatches before ordering some really fine SLW eggs for myself ... And these eggs just might be the first test run! I've also read, per the link I found on BYC to a primer on incubation from Texas A&M, that best case scenario is set to incubate within seven days of gathering, and meanwhile do not wash, and store at cool but not refrigerated temperature in a sealed plastic bag pointy end down. I've also read that it takes a chicken about 25 days to generate an egg, and that at any given time there are multiple eggs "in the chute", so to speak, in varying stages of development. So, the question: how long can they be away from the rooster and still be producing what have a decent chance of being fertile eggs? To restate, for how many days after the last mating might I be collecting fertile eggs that I can try to incubate? Oh - and the girls are as yet unnamed, and are purely hatchery quality. They were housed with white leghorns.