Originally Posted by Skink
They've both got a single comb! I thought that both BB and the fully fluffed chick hatched with rose combs, but it turned out to just be fully fluffed. I didn't know it could be affected by comb genetics! That is interesting. The little black one has the sparsest bowtie ever, I thought for sure that meant they couldn't be NN, it is good to know that isn't always true.
The other little scaleless pulled through and is doing great! So far no signs of oomphalitis. Hoping it stays that way!
That is one cute chick.
Pea comb has the side effect of reducing the overall feathering on a bird, not very noticeable on non-NN.. however the difference can be observable when NN is involved.
Nn with pea often will seem to have a small/medium bowtie, close to how singlecombed NN will look. They also have naked areas on the face and between the beak & comb, this pattern is pretty distinctive enough you can tell a chick is pea combed if you cannot see the comb in pic. Some of them can have very naked bellies and legs.. the back can look extremely naked while still wet after hatching.
Rose comb also has some effect but not really consistent.
Contrary to common basic genetic description of Nn having bowties and NN being clean necked... true clean necks are very uncommon, aside from the ones with pea and/or rose combs.
For years I tried to breed for a clean neck with no success.. until an egg trade with someone surprised me with clean necked chicks. Crosses of those with 'never had clean neck' NN stock did not give clean necks, it only showed up in the crosses in the second generation onwards.
Suspect the clean neck requires the bird being NN plus ?modifier of some sort? which seems to be recessive. I have not had a Nn with a clean neck so far.. and I've bred a *lot* of chicks over the years.
meanwhile through all this, the 'never had clean neck' stock that did not have any of the clean neck stock 'blood' never threw any clean necks.. always tiny bowties at the most.. some down to single or two feathers on side of the neck.