OK. I'm not an expert but a lot of these chickens that folks have posted pics of are not of molting birds. I suspect a lot of them are bad, no extremely bad cases of mites. I've had a few of my Gals go through molt and they loose a few feathers but they quickly fill back in. I don't think molting birds lose as many feathers as some of these birds have. If you see anything like these chickens have then you need to check for mites immediately. If I were to see raw, red skin I'm pretty sure it's not molting but a parasite and I reach for the only thing that I've found that will knock it down, Sevin dust. I'll only dust a hen if she's showing really bad signs of feather loss but when I do within just a few days she starts to put feather back on right away. One little Gold Comet that I named Miss Pity because of her feather loss got dusted and now she's almost back to normal. She lost her tail feathers but I think I'm seeing those coming back in now.
So, it may not be molt. Check this website by doing a search on mites. Mites attack at the base of the feathers and will cluster there causing the damage. If it is mites use Sevin or some other treatment to get rid of them quickly or it will spread like wild fire through your flock. And if you're against Sevin there are other treatments that are organic that work well too.