Well I read that it may be blackhead? But hes doesn't really touch other chickens? His poop is yellowish and thats common in black head. I'm giving him as much food and different sorts as I can. I don't know the protein intake. But hes getting cracked corn, sunflower seeds, bird seed, he ate some bread, berries, and he even ate some kibbles and bits. Haha. But he is eating more today and I saw him strutting his stuff for one of the chickens. He don't have any other symptoms. But his yellowish poop looks browner than yesterday. Oh! And he eats my horses feed sometimes too. Its sweet feed.