I just ordered fifty chicks from a hatchery. They arrived Wednesday. Nine were DOA and two died within the hour after receiving them. Since then, I've had three more die, one today and two yesterday. The hatchery says they probably have coccidiosis and said to treat with 1/3 cup apple cider vinegar to one quart of water. Is this standard practice? It seems like a lot of vinegar. Would something else be better? I have another sick looking one. It stands and bows it's head like it's drooping over and is becoming progressively lethargic! Please help! I've never had such an issue before with mail order chicks! It's been pretty depressing!