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A Cheap Bull May Be Just That

By Andrew P. Griffith
 
There have been several discussions recently concerning bull sales and expected progeny differences (EPDs) which is probably a factor of the impending breeding season. The discussions have ranged in topic and have included the timing of a bull sale, saturation of the bull market, bulls that should be steers, and matching EPDs to a herd of cattle or individual cattle to get the best end product from the dam. This is a wide range of topics, but they are all related to understanding the herd sire market and the intended market of the sire’s offspring.
 
Producers must first know and understand the genetic needs of their cattle herd before considering bulls for purchase which means there is a need for data. Once the genetic needs are identified, then bull purchasers can evaluate sires with EPDs that complement the cow herd and result in the desired progeny. A bull with the desired characteristics is worth more than a bull that will not meet the needs of the operation.
 
A cheap bull may be just that, a cheap bull. Paying a little more may result in more profits down the road.
 

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Validating Net Energy in Commercial Swine Systems - Gustavo Lima

Video: Validating Net Energy in Commercial Swine Systems - Gustavo Lima


In this episode of The Swine Nutrition Blackbelt Podcast, Gustavo Lima, PhD candidate at Iowa State University, explains how soybean meal net energy is evaluated using growth assays and calorimetry. He discusses caloric efficiency, validation under commercial conditions, and differences between controlled and real-world environments. Gustavo also highlights practical implications for diet formulation and ingredient valuation. Listen now on all major platforms!

“Indirect calorimetry provides a precise estimation of ingredient energy, yet validation under production conditions remains essential for accurate application in real systems.”

Meet the guest: Gustavo Lima / gustavo-lima-a9867127 is a PhD candidate in Animal Science at Iowa State University, specializing in swine nutrition, ingredient evaluation, and energy metabolism. With over 15 years of experience across Latin America, his work focuses on soybean meal utilization, caloric efficiency, and applied research for commercial production systems.