All of my chickens run together...now I want to separate my New Hampshire to incubate. How long should I wait to start keeping eggs for incubation so that I don't get any mixed chicks? I know the answer to a turkey, but not chickens. I separated them on the eve of 10-20-08. I read on another forum 3 weeks, but I wouldn't think it would be that long..At least I hope not. Any advice!?!