I've looked the 7 of my Icelandic pullets from the NYD hatch over... (only the blue one has frayed feathers) all of these birds came from my hens that I gave to Boston. Of Boston's Icelandics, 2 hens came from Kathy's eggs and the rest with the two roos came from The Sheriff's eggs. As you know I had one roo from that group that had the fray gene, but he was rehomed, but one of the hens or roos must have carried the gene.
I still don't know how many of the Icelandics from NotaFarm's eggs from the Easter Hatch have or carry the fray gene. I still don't know how many are roos or pullets... I do know that one little roo is injured... perhaps from a fall from the roost and I doubt he will make it. (They love to fly up high!... and then fight to stay on the roost)
Guess we'll just wait and see.