I don't have any answers for the problems that the Dels have but have some experience that I could share. I have gotten Dels from at least 7 different places and thought I was somewhat satisfied with the pullets and roosters last year. I am just a small breeder. Last year I got Dels from two different long standing breeders A and B I will call them. I used a rooster from A on my hens from B. I also had 1 hen from A. I got green legs on 90% of my pullet chicks. This is very dishearting for me and I am getting rid of all them green legs and have to start all over with a different idea. It seems the person that stated that Delawares are hard to breed right is correct.