We hatched them in an incubator and fed medicated feed. The necropsy showed zero signs of Marek's as I mentioned that when I dropped the bird off. As for genetics, I have no idea. The hens and rooster were Tractor Supply purchases last year.
My wife and I hatched out 16 chicks from two bantam hens and a rooster that we got last year. At about 12 weeks they started dying. Dropping wings, lethargy, leg paralysis. None of our other birds from outside sources are showing any signs of illness. Is it possible that there is something...