I have read that ducks don't need food and water at night after they are about 8 weeks of age. My ducks are 9, almost 10, weeks old. Their duck house is nearly ready for them, and when they "graduate" to their duck house, I don't want them to have food and water in it because I use OSB on the duck house and I'm afraid it won't last as long if they have water in it. So, I need to know how to wean my ducks off their food and water and night. They free-range during the day and have access to their kiddie pool all day long.