I mixed sand from our Florida soil with peat moss and added a very small amount of “100% natural hardwood charcoal. ( I couldn’t find wood ash and reading said charcoal ok substitute). So 2 questions please help. First the charcoal is very tiny pieces, but not dust. One chicken had a piece and I’m sure she was going to eat it, not bathe in it. I took it away and picked out all the charcoal. ? Is this safe? Next the chicks had a great time pecking ? Eating? The sand mixture. No bathing was going on. I took it away until I heard from you “ experts ! Is the charcoal good and can they eat all that sand? They are eating their chick food non stop until then. Thanks so much!!