This is absolutely the best product for fly control. I use it in my barn daily right after cleaning the stalls in the morning. When the horses come back in the barn in the afternoon their stalls are fly free. The shipping was FAST. Great product. I highly recommend.
We bought this product because of a flea problem. Nothing really seemed to work, so upon some research we bought it and it worked great. The only con to this is: you should wear a respirator while using this. I had a coughing fit while spraying the rooms.