I recently bought a 4 week old chick. He is sick, but was recovering. He had an issue in which his beak had mucus, but he was not sneezing or wheezing. He was constantly falling asleep and being lethargic. He had swollen eyes and watery mucus poop. I started giving him vitamin and treating him with corrid. I also was feeding him egg and cottage cheese. He was starting to run around and following me everywhere! eat everything and be happy. he no longer had mucus in his nose and was pooping fine. his eyes are not swollen anymore. I did that for a week, but didn't do it for 2 days. now he has mucus coming from his mouth, one beak nostril is red and he is back to being lethargic, his poop is yellow and he keeps scratching himself. Any advice? I really love this chick. Thank you.