It is normal for the some bareness. The turken breed which is the cross that developed the SG is bare under wings, at the neck and the butt, this was to make it easy when removing feather for butcher.
With the SG's it is important to NOTE that when breeding two clean necks together you will have that same affect, but never will a bird hatch that has no feathers, or less. they will continue to have the same type as the parents.
My suggestion is to breed clean necked males to bearded and non-bearded hens this gives you the more desirable feathering plus you will have both bearded and clean necked offspring. This is the way I prefer to breed. I do this, so when needed I can replace an older roosters and/or hens with younger and sometimes better type without buying. this prevents me from having to deal with other genetic issues such as color crosses, toes, or poor egg production. which come about when you add a SG from a flock with no history . It is important to keep the nice type roosters for at lest three, sometimes five years before replacing, this gives you a nice spread between generations.
Those of you that like more clean necked birds could bread bearded roosters to clean necked hens. This keeps the feather issues at bay.
Hope this answered you question. Thank you.
