With many parts of the country experiencing extreme heat, it is important to remember that cattle aren’t able to dissipate heat well and are more susceptible to heat stress. Cattle can experience heat stress at temperatures around 26oC, depending on the relative humidity. They don’t sweat as efficiently as other mammals, and the rumen produces a lot of heat through the process of fermentation; their temperature spikes four to six hours after feeding.
Heat stress can result in reduced feed intake, reduced daily gain, and death in extreme situations. Secondary effects such as acidosis or sickness from going off feed may also be an issue. Heat can reduce bull activity and change the way a cow shows signs of estrous which can result in a prolonged calving season. These various effects can add up to big dollars lost from a producer’s pocketbook if the risk or effects of heat stress aren’t reduced.
The risk or effects of heat stress can be reduced by: Continue reading