we had a huge fly problem before the chickens even went out. It was do to our dog and the neighbors dog.
I went out and bought those stinky fly traps, and all though they worked great I really can not handle the odor. So I just try and keep up with the cleaning. Now though my neighbors are using the compost pile that is within a foot of our property line. And they dont compost properly. So the flies are coming to that. And the other neighbors dont clean up after their dog. So we are surrounded.
The fly sprays arent working at all for the horse this year. And I have gone through three brands with no break from them.
I will try seeing if feeding him some de will help.