This is the left wing of a 5 day old chick! Reminds me of thrush! I've been treating with hydrogen peroxide and antibacterial spray. Looks similar to thrush to me, any ideas? Chicks are in a clean brooder with clean food and water. Brooder is cleaned and sanitized weekly with bleach and allowed to sit a week before rotating chicks into clean bedding . I'm open to suggestions !!!!!!