They do appear to be molting, I'm thinking you need to get more protein in your hens, they appear to be sexlinks which lay like crazy, they are the only type that I have dealt with as far as feather picking, I believe they have a higher protein need than average hens, I would up the protein content of your ration as well as getting some boost of protein by feeding things like cottage cheese, eggs, meal worms, or canned tuna or other fish, they are eating each other's feathers for the protein, and if done enough over time the feathers can't grow in properly, you're stuck in a cycle.