Provide your cattle with the consistent mineral intake they need to thrive with the Purina Wind and Rain All-Season 4 Beef Cattle Mineral Supplements with Altosid IGR for Horn Fly Control. Containing 4% phosphorus, essential macro and micro trace minerals and supplemental vitamins A, D and E, these cattle mineral supplements provide the complete mineral nutrition to address mineral deficiencies inherent in forages while supporting optimal health, fertility and growth. Protect your mineral investment with the Wind and Rain mineral tub that offers the ultimate weather resistance in a convenient, self-fed tub form that reduces labor while maintaining palatability, bioavailability and target intake levels. This beef cattle mineral tub also contains Altosid IGR for the prevention of breeding horn flies in the manure of treated cattle. Purina recommends counting your flies and testing your forages to ensure you provide the appropriate mineral and vitamin supplementation to your herd year-round.