Effectively control all biting and sucking lice from your horse. Fine powder contains 0.25% synthetic permethrins to kill and repel lice and horn and face flies from your horse or pony. Simply dust 2 ounces over the coat and brush against the hair lay for effective control. Can also be used as a perimeter control in the stall, barn, or stable. Use alone or with any commercially available dust bag. Convenient 6 ounce sprinkle container. Sorry, this product cannot be shipped to California.