Cold Stress and beef cows.

B Estimated Lower Critical Temperatures for Beef Cattle * b HT <table><tbody><tr><td>Haircoat Descripton</td><td>Lower Critical Temperature</td></tr><tr><td>Summer Coat or Wet</td><td>60 degrees F</td></tr><tr><td>Dry Fall Coat</td><td>45 degrees F</td></tr><tr><td>Dry Winter Coat</td><td>32 degrees F</td></tr><tr><td>Dry Heavy Winter Coat</td><td>19 degrees F</td></tr><tr><td colspan="2">* From Browsen, R. & Ames D." Factors that create stress during the winter months are cold, wind, snow, rain and mud. The result is that the Dry Winter Coat goes from having a critical temperature of 32 degrees F to about 59-60 degrees F. From several studies it is estimated that for every one degree below the critical temperature a cow's energy requirement (TDN) increases 1 percent. [Extracted from the article]