Put these tiny stingless wasps to work on your flies. Simply sprinkle Fly Predators on your manure areas as soon as the weather turns warm, and you'll prevent flies from ever becoming a nuisance. Then release Fly Predators monthly to keep the fly population down. These tiny USDA-approved insects are the natural enemy of flies, but never bother people or animals. Fly Predators ship in immature stage inside a pupa (cocoon). When they start to emerge, release them in areas where fly reproduction "hot spots" occur. Fly Predators lay eggs inside pest fly pupa, and the developing Fly Predators consume pest fly larva. Will not eradicate existing adult flies but will minimize the development of new pest flies. Use traditional methods (fly strips, traps, to eradicate adult flies.) You'll need 300 Fly Predators per goat. Minimum order (5,000) will cover a 16 goat herd. You'll also need to figure how many months of Fly Predator orders you'll need (first to last frost dates, daytime highs of 60 degrees F). Fly Predators come in 5000, 10000, 15000, 20000, and 25000 quantities. 50% bonus added for two months if you order five months of Fly Predators. Prices are per monthly order. To order multiple months, enter number of months as quantity and then use the drop-down box to click on the months you'd like to receive each order of fly predators. Shipping is included in the price per month.