I have twenty chicks all but a few are doing very well. I have been losing about one or two a week. It starts by just not running with the others then after a couple days they not eating and then their wings start to droop. It's like they're starving themselves and then get weak and die. I feed none medicated nature-wise starter-grower and they have fresh water and grit. They also have a 8X12 run. and I do let them outside the coup to free range every day. Don't know if it could be worms or mites but they are not acting like it would be mites. I have been raising chickens most of my life and have seen this before but just looking for some advice. Thanks Mike