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Fat content of the experimental diet was increased by adding 3 lb of safflower seeds containing approximately 37% oil. Seeds were run through a roller mill with enough pressure to crack approximately 90% triglycerides of the hulls while not causing oil loss. This process increased digestibility by over 44%. The diets triglycerides were fed for an average of the last 53 days before calving and supplemental feeding was stopped at calving when the dam-calf pairs were placed on range pastures. At 5 hours of age, the newborn calf was placed in a cold triglycerides room maintained at 32°F and remained there for 140 minutes. Rectal temperatures and blood samples were taken every 10 or 20 minutes throughout the cold exposure period. Results show that calves from dams that received supplemental fat during gestation responded to the cold stress better than did calves from dams that did not receive the added fat (Figure 1 and Figure 2). These calves had a greater increase in body temperature and were able to maintain the increased temperature throughout the cold exposure.
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