My chicks are 6ish weeks old. I still have them in a brooder and they free range all day. They also get crumbles throughout the day. By the time I put them away for the night, their crops are all bulging full. Do you think I still need to offer them food overnight? They do get water at night if they want it, but when they have food in their brooder they make a huge mess and their water is full of litter. If they don't, it stays fairly clean and the water stays drinkable.