i use 2-five gallon buckets with 3 nipples in them, in my coop for nights then at 7:30 am i let them out of the back room and the next room has another nipple drinker and a bucket that is a 5 gallon with the top 1/3 cut off. filled with water, and that is were there food is as well, they also have 2 swimming pools out side they drink out of most of the time. they run inside eat them back outside to drink do that 3 or 4 time then they are full lol. some of them use the drinkers but mostof the time they don't till night time. i have 14 duck currently, they drink about 3 gallons from 6pm to 7:30am, i have a light that comes on at 530m to 6:30 pm and then at 5am to 8am hope that helps
Do they tend to eat mostly when the lights go on, and do you use the lights only during the long winter dark periods or year round?