Flies can be a problem in barns, as these sites often contain food sources such as spilled feed and manure. Removal of these food sources is the key to controlling infestations. In addition to proper sanitation, apply scatter baits on the ground or in bait stations in areas where flies are seen congregating. Hang or place traps near windows and doorways that flies may enter through. Make sure baits and traps are outside the reach of livestock, pets and children. In warmer regions, spray the exterior of the barn and the inside of windows with QuikStrike® Fly Bait Spray.