Cow-Calf Certification Practice Exam

What is one effect of using beta-agonists in the feeding of cull cows?

1. Improves fertility rates

2. Increases meat quality

3. Enhances weight gain

4. Reduces feed costs

The correct answer is: Enhances weight gain

Using beta-agonists in the feeding of cull cows primarily enhances weight gain. Beta-agonists are compounds that target beta receptors in the body, which can lead to increased muscle growth and reduced fat deposition. When used appropriately, they can improve feed efficiency and accelerate weight gain during the finishing period of cattle, directly impacting the overall productivity of the herd. This is particularly beneficial for cull cows, as producers typically aim to maximize their economic return by ensuring that these animals reach market weight effectively before sale. While the other options may seem beneficial, they do not accurately capture the primary effect of beta-agonists. For instance, fertility rates and meat quality can be influenced by various management practices but are not directly improved by the use of beta-agonists. Additionally, while there may be some indirect effects on feed costs due to improved feed efficiency, the primary and most significant outcome is the enhancement of weight gain.