That sounds like rooster damage. Molting does not make them barebacked. If a feather is broken off and even a tiny part of the shaft is left behind that feather will not grow back until they molt.I have 3 that seem to have been molting for months! The feathers are starting to come back in, but they're barebacked.
I don't know why yours are molting this late, could be a few reasons. You'd think by this late in spring in Tennessee they'd pretty much be back laying full blast. Changes in the pecking order can sometimes temporarily stop them laying but they should get over that pretty quickly.We've gone down the past week to 4-5 eggs/day! From almost a dozen. (Granted we did sell 5.) But I have 14 hens atm, 1 broody, 3 molting = still should be getting around 10 eggs a day. Somebody is free loading! lol
In my opinion, a higher protein feed for yours will help them get off to a good start if fed for the first month. To me, 18% is higher but nothing wrong with 20%. It will not hurt to feed that 18% longer so I'd feed it until the bag is empty, 8 weeks, 12 weeks, whatever it takes. Then I switch to a Grower, low calcium and 16% protein. I stay on that for the rest of their lives with oyster shell offered on the side except when I have baby chicks. Then that all get the 18%.I def want them healthy, and if a higher protein would benefit them at least for the first few months, I'd like to know
If you isolate your chicks that will be meat chickens you might see a benefit in feeding them a higher protein feed, but if you let them forage the benefit is probably not going to be that noticeable.
I consider mine healthy. They enjoy chasing down june bugs and grasshoppers. They lay decent sized fertile eggs that hatch into healthy active chicks. They don't get so large I worry about them hurting their legs when they jump down from the roost. I eat mine but size isn't that important to me. There are only two of us so I can get two meals out of a small hen or pullet. The difference in a larger cockerel is that I also get to eat leftover chicken for lunch.