Molting starts with the head and works its way down to the tailfeathers, says Marissa King. During a molt, the flock is working hard making sure new feathers will offer just as much warmth and protection as old ones. She offers some tricks to help a flock’s molt go smoothly.
Molting can be a very painful and stressful time for your chickens.”
Source: Hobby Farms, September 22, 2021. Link. Keeping the flock’s environment during a molt as stress-free as possible will help them recover quicker. Nutrient deposits are drained leaving the chickens vulnerable. Shedding feathers exposes skin to the elements and pests.
Consider cooping the whole flock during the molt. Separate the roosters from the hens too.