I have not gotten on this in a while. I have about 34 chickens of various breeds....love them all! My newest girls that I got last spring, are laying well but lately they have been looking pitiful in the hind-end area. There is no sores or broken skin, just red and sort of swollen looking. My older girls don't look like this but are older and in a different pen. I don't know what to do, they are otherwise laying and eating and drinking normal. I wanted to add that I have no rooster in the pen, or that has access to the pen. Can anyone tell me what it might be? Thanks for any info.