This is Hapsburg, a cockerel who had a difficult hatch and to this day remains a little weird. One of the ways he's weird is his comb. All eleven of his siblings and half-siblings have identifiable combs, but he has this monstrosity on his head: I've read the article on this site about comb genetics, the separate alleles for rose comb and pea comb, but that doesn't answer the question of how I got an Indominus Rex for a rooster. What could have made him develop this? In case it helps, these are his parents, an Easter egger and a Silkie/Mille Fleur cross, who also produced a single-comb bird.