Hello, I have 4 female, 1.5 yr old Runners. They have a run enclosed with hardware cloth and an unheated, attached coop that they are locked in at night for protection. There are two small “windows” near the ceiling of the coop for ventilation, but the rest of the walls and door are solid plywood, so they are protected from the wind. I use wood shavings for bedding, and use the deep litter method, topping the bedding off each morning and night as needed. Two of my ducks have started molting- it’s mid-December, and the lows the next few days are 20F. The two molting have lost their flight feathers, and the pin feathers on one of them are growing in. I feed them Mazuri duck feed, with mealworms, and sometimes a scoop of cracked corn. They also have access to oyster shells. Do they need any additional support if they are molting in very cold weather? They are my pets, so I really want to do everything I can to keep them safe and healthy. Any advice is greatly appreciated!