Beef Tips

October 2018 Feedlot Facts

“Preconditioning for Profit”

By: Justin Waggoner, Ph.D., Beef Systems Specialist

Vaccine and antimicrobial technologies continue to improve at a breakneck pace. Yet we continue to see that calves that are unprepared for life in the feedlot and which undergo significant stress during and after weaning en route to the feedlot will have morbidity upwards of 30% and first treatment success is often only about 50%. Calves that get mild respiratory disease in the feedlot will have 0.2-0.4 lb. lower ADG and those calves requiring multiple treatments for respiratory disease will gain 0.6 lbs less for the entire feeding period. This translates to about 15 lb. less carcass weight and 10-15% fewer choice carcasses. It pays to keep calves healthy. Preconditioning can mean different things to different people, from giving calves a single vaccination prior to weaning, all the way up to two full rounds of vaccination, before and after weaning, weaning the calves from their dams for 45 to 60 days, and transitioning the calves onto a total mixed ration, eating from feedbunks, and drinking from waterers. As far as animal performance is concerned, the extent of preconditioning needed to minimize problems at the feedlot and maximize feedlot performance depends on the extent of stress imposed on the calf during transition. Studies at K-State suggest that single-source calves shipped four hours to a feedlot will benefit from preweaning vaccination, weaning and feeding for at least two weeks before shipment to the feedlot. However, if calves are going to be shipped more than eight hours from home, they will be commingled with other sources of calves either in transit or upon arrival at the feedlot, and are likely to experience adverse weather conditions during the transition period to the feedlot, vaccination and weaning for six to eight weeks before shipment would be preferred. Investing time, technology, and labor into the calf crop has very real costs for the rancher. But the high purchase price of weaned calves entering the feedlot means the financial risk of respiratory disease and the uncertainty that respiratory disease causes feedlot producers has very real costs as well. Many feedlot producers are willing to pay ranchers a premium to mitigate some of the disease risk that causes the feedlot economic uncertainty — consider it “biological risk management.” When certified preconditioned calves are sold at special preconditioned calf sales, they have the potential to bring significant premiums over non-preconditioned, “commodity” calves. Respiratory disease is the most costly disease in the cattle industry, and the greatest factor affecting calf performance in the feedlot. If you can prevent or control disease, you can, to a certain extent, control performance of calves. Feedlots are paying premiums for calves that are prepared for life at the feedlot. Why? Because they perform and are predictable — predictability is the opposite of risk. As a rancher, you can and should be paid for your investments of time, money and management. For more information, contact Justin Waggoner at

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