I filled the 40 lb. feeder over 3/4 full on Monday morning. On Tuesday morning I went out to check on the girls and it was just about empty!!! I have 12 standards and 5 silkies. Is it normal for them to eat that much?? The food is inside the coop and the coop is in a fenced in yard. We lock up the coop at night. Wow, if this is normal I am going to need to get a second job!!! How much should I feed and should I feed every day??