One of my roosters (not sure of his age, but he might be older) has been sick for about a week. He sometimes has one eye closed (although not so much the last couple of days), has laboured breathing, and sneezes. He is still eating and drinking although he seems to have little energy. This morning when I let everyone out of the coup, I noticed his feathers all over the place but do not see any bald spots on him. He is gentle for a rooster and has always crowed like he has been smoking cigars all of his life. Is there anything I should or can do?