We have throughout the summer brought in several more birds.maybe 20 in all. We finally fond the rooster we were looking for. And then we brought in 10 hens. 4 cinnamon queens and 6 that look like bard rock but a bit smaller. Several we're in molt but appeared healthy. Then last week one of our originals started declining. She looked like she was not eating. ( I knew she was near 5 years old and had tried to go off and make a nest in the grass this summer but none hatched. She was a little depressed for about a month but go back to flock life fine. ) She could barely get around. Then one day my son gave her some bread and she ate eagerly and was looking better for a few days then last night she passed. Now one of our Americans is going through the same cycle. Can't get up to eat but will set next to the bowl of scratch if we get her some. These birds are free range most of the time but with all the rain have chosen to stay close the the coop if not in it for the last couple weeks. I really love my Americans and don't want to loose one right after the next. They do have mighty, or lice I honestly don't know the difference. We have dusted with diatomaceous earth but that did not fix it. As for what they eat... All sorts of produce that goes to the mulch. And chicken scratch... Same we have always used. And bad bread. We just put straw in the floor of the coop cuz it's dirt . To keep it warmer and dry just in. Case the rain got it. So far it has not. I think that's all the info, if more is needed please ask. They need best of care and I'm not sure we're we are failing. Thanks for any help.