This concentrated permethrin product is for use directly on animals (horses, dogs, goats, sheep, hogs, poultry, beef and dairy cattle), their premises (barns, stables, pet beds, porches, garages, etc.) as well as other indoor/outdoor applications. Fly-Rid Plus is a multi-purpose, multi-species insect control spray that provides powerful yet safe protection against harmful pests. Multipurpose: For indoor and outdoor use.