OLS Tubs - All Natural Livestock Feed Supplements for cattle, beef, dairy, horses, foals, sheep & goats - It comes down to having better livestock that make more money. We are here to make everything that your animals eat be 25-30% more valuable to them. They are highly concentrated vitamin and mineral packs, with high Vitamin A, E, and D content. This high concentration means that small intake yields big results, making it a very cost effective system