Over the past couple of months I lost two hens out of our flock of fourteen. Both died while we had a pet sitter but neither showed any indication of illness or injury. The first was a beautiful brahma 1 1/2 years old. The second a brown leghorn of about the same age. When I examined the brahma, the only thing I noticed is that a large percentage of her body feathers were new ones growing out. The leghorn had also molted out quite a few of her feathers and was starting to regrow. I understand that molting takes a great deal of energy, but do some birds simply die? It's late in the year and we've had some very cold weather, but I have a heat lamp in the coop. My girls have layer ration and feather fixer as well as scratch in the late afternoon. They are free range a few hours per day on average. If molting can overwhelm a hen, is there anything I can do to help them through it? thanks for any advice you can give!