Purina’s Wind and Rain® Fly Control with Altosid® (IGR)  is a line of beef cattle minerals that help prevent the breeding of horn flies in the manure of treated cattle; designed to address the mineral deficiencies of the available forage in a palatable, weather-resistant, granular formula. Wind and Rain® Storm® cattle minerals’ large particle size and special formulation keeps the mineral from absorbing water and blowing out of the feeder.  The Storm® technology provides the ultimate weather resistance to reduce waste and makes Wind and Rain® Storm® Formula more economical to feed than conventional loose minerals.