Keep your horses free from the annoyance of stable flies, horn flies, and house flies all season long with this convenient, long-lasting solution! This easy-to-use formula provides 156 daily doses (feeds 5 horses for 1 month) to feed throughout fly season, and is simply added as a top dress to your horse's feed. The larvicide passes through the horse and targets flies developing in the manure, eliminating them without harming dung beetles, nature's manure disposal crew. Enjoy a calmer, healthier environment for your horses with this season-long fly control solution!