I'll look into that fly bait thing. I have used several types like that, also. I have a barn spray that does instant knockdown, but I can't use it around the ducks and more just come back later anyway!
Today, I just closed the door to the coop since the ducks don't go in there during the day...
I want to ask...what do y'all do for the flies in the duck house?? We clean it every day, replace their water every day. They are outside in the backyard all day, too. We leave the door to get in from the back yard open all day, but they rarely go in once they come out in the morning.
We...