Thank you so much for your help. Do any of you know what this can be? I called vet several times for help with this problem and he had me to try Sulment, It did help 3 of my girls but my sweet Barred rock is really sick with this.This started around the same time I cleaned the coop to get it ready for winter. Here in Western Kentucky It gets cold so added wood chips and straw. Also about a month ago I bought some Polish and Frizzle chickens they look clean and healthy but they are separated from my big girls by screen. Nothing else added to the coop.Just trying to figure out what happened as I try to keep them healthy.