melissa, I did not notice any unusual smell from them.
I had three with fray this year. None of the three was a blonde chick at birth, all gradually got white, with splotches, as they got older. A male and female that were hatchmates and a female that was hatched three weeks later. All three were the progeny of a trio. The rooster from that trio was culled. I have not had another fray born, thus far, from the same hens with a different rooster. I have daughters from the original rooster and a couple of sons, time will tell if they carry the fray gene.
From Kathy's post, I will have say that at least one of my original hens must carry the recessive gene. They are both from the same flock so both could carry it.