Ditto Stonewall you may be right. I was told that the more successful Game Cock breeders will not breed old Cocks or old hens. Believing that within a certain age, the Cock's sperm or Hen's eggs are not as virulent. Producing weaker type birds.

Whether true or false could apply to our dog's as well. I do not know how some of the last litters bred off Red Boy turned out. Red Boy lived to be around fourteen years old if I remember correctly. EWO may know. Cheers