Cow-Calf Certification Practice Exam

Which nutrient is critical for developing heifers before the breeding season?

1. Fat

2. Carbohydrates

3. Protein

4. Minerals

The correct answer is: Protein

Protein is critical for developing heifers before the breeding season because it plays a vital role in their growth and reproductive health. Adequate protein intake supports muscle development, which is essential for achieving the proper body condition score prior to breeding. Heifers require sufficient protein to ensure appropriate mammary gland development, which is important for future lactation and calf production. Furthermore, protein is necessary for hormone production, including those that regulate estrus and ovulation, thus contributing to successful breeding outcomes. Ensuring that heifers receive the right amount of protein helps promote their overall health and prepares them for the demands of pregnancy and lactation. While fat, carbohydrates, and minerals are also important for heifer growth and development, they do not specifically target muscle development and reproductive maturity to the same extent as protein does in the context of preparing heifers for breeding.