During molt, I find that treating them with cheap cat food works really well. Don't overdo it. Yes, through the years I've had one or two that went almost bald during molt. I tend to get a bag of fairly high protein feed, and mix it into their normal feed. Two scoops normal feed, one scoop high protein. I feed it to the whole flock. When they're mostly feathered in, I decrease the protein, but continue the cat food as an occasional treat. The reason for the cat food is that it's animal based protein, while most feeds are vegetable based protein. They actually do need a little animal protein, and the cat food is an affordable way to supply that need.