My cockerel Roody has developed a black and white runny stool. He is on medicated chick starter as well as apple cider vinegar. He is one of four siblings and the only symptomatic one so far. He appears to have a good appetite and cheerful. But when I brought him in I thought he was llistless. He laid in my arms and looked around. When I took him outside and he heard his siblings he perked back up. His feathers are shiny and exept for a little white poo stuck in his tail feathers he is keeping himself groomed. I cleaned his butt featherrs and he finished preening them. Not sure what this could be, but do have field mice relatively prevalent here as we live on the edge of a forest and mice are par for the course here. Chiipmunks as well so can't put snap traps out for mice. Please could someone tell me he's going to be ok. I love him dearly.