I believe males are typically slow feathering...I have my first chickens, now 5 weeks old and 8 of them are Barred Plymouth Rocks. They are feathering in SO differently. I got straight run BR from McMurray. 5 are feathered enough to move out to the coop, but 3 of the 8 are just barely starting to feather beyond the wings, and 1 still has no tertials. I assume this is part of the delayed feathering gene complex. I had read somewhere that only males will exhibit the late feathering, but I am starting to think that these might be pullets. Is that possible? But, if they are delayed in feathering, will they also be slow in comb and body growth? One of he 3 is noticeably smaller than the others. Does this slow start mean they will not be hardy or productive? 2 of the 3, including the littlest one, are the life of the party in the brooder, the other seems less vigorous.
They are anxious to get into a bigger area, but with temps around 40 at night yet, I'm nervous about putting the downy ones out yet.