I have a sick turkey chick, Broad-breast kind raised for eating. They are probably less than 2 wks old, 4 of them living in a feed bin. We clean and sterilize and put new bedding every time we change birds in the bin. These guys get generic "game bird / "Meatbird" food, and we give all our birds water w/ apple cider vinegar and occasional doses of food-grade diametatious earth to kill any parasites they may get, so they are generally healthy. One turkey chick is sitting by himself, droopy state, lethargic, not really eating or drinking, just sits with his eyes closed and squeaks. Already separated and given his own food/water, dusted w/ diametitious earth, and a red heat lamp to keep him warm. We're in southern California if that helps for area info. They are not in direct contact w/ any other birds, although we do also have quail and chickens in the same area but separate pens/housing (same air), and we handle all of them. Any ideas what he could have? Contagious? Treatment? Antibiotic? Could I give him fish antibiotic? Already sterilized the bin, replaced all the bedding, food, water in the bin so the others have fresh stuff. Thanks.