Newbie here, just learning about chickens and loving it. Yesterday I got 2 silver laced wyandottes who have had too much rooster exposure (no feathers on their backs). My questions is, should I try to hatch their eggs? He said they have been laying and my friend has an incubator. How long after they have been with a rooster are their eggs still fertile? Thanks for the advise, I love BackyardChickens.com, so many great people and good information!