Here are a few ideas for you to consider.
It is ideal when the duck pen drains so that there is no standing water. A 2% slope will do it. At the low end, a shallow channel leading into a garden bed, mulch pile or even a grassy area will make good use of the enriched water.
Spalding labs sells fly predators, and has some advice about controlling flies. That's where I get my fly predators from.
If you can set up a fan - that is not exactly a fix, but it is a kind of work-around until things get managed.
Our first year with the ducks I was getting concerned about the flies - they seemed to suddenly proliferate. Now, there are some around but nothing to worry about.
I am wondering if flies are breeding under the OSB boards. I may not be picturing it quite right.
It is ideal when the duck pen drains so that there is no standing water. A 2% slope will do it. At the low end, a shallow channel leading into a garden bed, mulch pile or even a grassy area will make good use of the enriched water.
Spalding labs sells fly predators, and has some advice about controlling flies. That's where I get my fly predators from.
If you can set up a fan - that is not exactly a fix, but it is a kind of work-around until things get managed.
Our first year with the ducks I was getting concerned about the flies - they seemed to suddenly proliferate. Now, there are some around but nothing to worry about.
I am wondering if flies are breeding under the OSB boards. I may not be picturing it quite right.