Thank you for your response. His feet are free of cuts or blemishes and he does not have blood in his droppings. I have researched on the internet and found information on Marek's disease, and about six other things that it could be. We are going to treat for everything that it could be. We have vitamin/electrolyte water and water with cider vinegar. We also have DE and dirt in their bath container. They free range in the woods on the old farmstead. we have found very, very small metal pieces from old cans and such with our magnet. We are hoping it is not metal ingestion. His eyes are good and his pupils are round and dark. He is six months old and has not been vaccinated. We will try antibiotics next. Thank you for the flush link. We will try that! I love Backyard Chicken people!!!!!!