I had no real opinion about Crested Ducks until I bought some call duck eggs. They said there was a "rare chance that I might get a crested." In reality There is gene in crested ducks is linked to a lethal outcome during incubation. Ducklings carrying both genes (both parents having a crest) die in their shells before they get a chance to hatch. (some with their brains on the outside of their skull) When breeding a crested to a non-crested, they have estimated percentages of; Those who will not have crests, will have crests, those that will die during incubation, and the ones who will die after hatching. I can not find photos depicting what this lethal allele actually looks like in the embryonic, or the chick stages. So I think it would be good to show members considering on incubating or breeding crested ducks the sad truth. I have pictures of some of this. I can post these if anyone else sees the need to expose these heart breaking truths. If I had any idea, I would never have gotten any of them. If any make it to hatch, I won't breed them.