Thanks Don. Then I am really wondering if complete dominant, why aren't side sprigs showing up in more of my former roo's offspring? Carrying two copies of the side sprig gene does guarantee side sprig in offspring because it is a dominant so even if from hens with clean combs, every single offspring should carry the side sprig because its dominant for homo or heterozygous. (going by my book learning here as well as decades of dog and horse breeding) unless what may have looked like a side sprig really wasn't? That is the only way I can understand that his 45 offspring (of which 30 are here and the other 15 are owned by a nearby friend) shows one side sprig. Geebs saw the cockerel at the recent swap meet and pointed it out to me so I went back over the 35 pullets/cockerels we have here and of course, found the one Geebs saw. I went over to my friend's house where he has several cockerels and hens and we looked at every single one of them and none carried a side sprig. Maybe I just missed them!
Again, I'm just trying to understand. I read the definition of side sprig was a *pointed* sprig versus a *bump* etc., but I guess any type of slight protuberance from the comb is considered a sprig.