A year and a half ago our area was hit with Pidgeon fever. A highly contagious illness which requires very strict quarantine and lengthy health care. I decided to try "Fly Predators" as I did not want to go through this again and Flys are how this disease spreads. I was able to get most of y i my neighbors to also purchase "Fly Preditors. We were almost completely Fly free in our neighborhood. Even though Pidgeon fever continued to ravage the neighborhoods surrounding us none of our horses in our neighborhood contracted it again. THANK YOU Spalding Labs.