Yes, last fall, when my one of my hens went into a molt for the first time, I noticed she was huddled up and not participating in her usual way with the others, both at the feeder and in general while she was free-ranging. She started looking thin and I finally checked her crop one night, only to find that it was empty. Panicking, I started hand-feeding her every evening inside our kitchen, some hardcooked egg yolk or other highly nutritious food, trying to make sure she had something in her crop each night. She was VERY finicky, often only eating just a bite or two. I faithfully hand-fed her for a couple months, until finally her usual behavior started coming back, she finished her molt, and returned to normal.
This year when she started a molt, same thing happened. Only, this time, I decided *not* to hand-feed her, instead concentrating on offering good quality feed and treats during the day, and let her do "her thing". She refused the high-protein feed, and instead craved...fruit, specifically wild berries, and secondly, fresh cranberries. She effectively stripped all our landscape and bushes of their wild berries and "fruit". Then I brought out a bag of fresh cranberries and she raced around eating them, while the rest of the flock ate their feed plus seeds, nuts, extra protein and other treats.
Now she's back to her normal appetite, having re-grown her feathers and looking sleek and plump again. A few days ago, another hen started molting: same bizarre appetite loss and she's looking miserable and standing apart from the others. I am watching that girl, carefully, while deciding how, if at all, I will intervene.
Their molt is hard on them -- and on me!