Just so we are clear the last picture isn't the one you liked. That is the other cockerel and I am going to cull that one correct? Next to last picture is him and he actually only has like 2 dots of mossy so I think that is good. I believe first hatch is from Jade. Second hatch I think may be a mixture of Jade and Ruby. Hatch 3 and 4 I marked who they came from. I have eggs from Jade, Ruby, Pearl and Original rooster pen hatched 2 BC in hatch 3. Hatch 4 goes in lockdown tomorrow.you are worrying too much .the cockerel is fine ,.mossiness on the cockerel is no as bad as on the pullets .the cockerels carries a lot colour pattern in they genes .
if the mossiness is on the lower part of the body { chest ,lower abdomen } than it is a problem .
you cockerel is mossy on the upper part of his body .
chooks ma