Purina® High Octane® Heavy Weight® Topdress Show SupplementPurina High Octane Heavy Weight Topdress is an extremely palatable livestock supplement that has no added copper and is high in crude fat, containing 70% fat, 8% protein, and 0. 10% fiber, which supports growth, bloom, and body condition. Purina High Octane Heavy Weight Topdress supports healthy hair and skin with a proprietary fat blend that can be mixed with tap water stays in solution and can be poured on feed to support voluntary feed intake.