I have a neighbor with a few Welsummers. He gave me some eggs this past spring and I incubated them. They were really nice looking eggs! bargain said they were nice also. However, fertility was terrible! I really think it was his rooster. Please forgive my ignorance here. I understand that the Rooster carries the dark egg gene. They say to keep rooster out of the darkest eggs. If I were to put a different rooster on the same hens it would not change the color of the hens eggs obviously. But, since he is supposed to be contributing a dark egg gene will the daughters lay a lighter egg if he is not as good? I would want to keep a replacement rooster out of the eggs we hatched because the egg color is so nice. So if I put this young rooster back to the original hens, would the egg color be mostly retained? Thank you for any advice you can offer.