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The morning sun illuminates these cattle in a feedlot in western Iowa on a summer day. DarcyMaulsby/iStock/GettyImagesPlus

Tips to reduce heat stress in livestock

Heat stress costs dairy and beef producers hundreds of millions each year.

Proactive measures implemented before an extreme heat event can reduce immediate and long-term impacts of heat stress in ruminants.

“Mitigating impacts of heat stress begins before an extreme heat event,” explains Jessica Fox, veterinarian and director of veterinary services and biosecurity for Ralco. “The impacts producers’ see are only a small portion of what is going on inside a ruminant during an extreme heat event.”

Fox explains that by the time ruminants show external signs of heat stress: going off feed, labored breathing, panting, increased water intake, decreased activity or sweating, heat stress has already begun to wreak havoc on vital, internal systems. “Heat stress triggers a cascade of events that impact a bovine’s production ability, make it susceptible to disease and, in extreme circumstances, death,” Fox says.

Fox and Dr. Jeff Hill, ruminant nutritionist and Ralco brand manager, offer tips to lessen heat stress on livestock.

Access to water

During an extreme heat event, cattle need nearly double the amount of water they would typically consume. “Ensuring abundant access to cool, fresh water is the single, most important step beef and dairy producers can take,” Fox said.

Because heat events can tax automatic water capacity, Hill suggests putting out extra free-standing tanks prior to a heat event. “Not only does this ensure all have access to water, but it keeps the herd from bunching up around water tanks–exaggerating the issue."

Droplets. Not mist

Prior to a heat event, producers should also test feedyard sprinkler systems to ensure they are functioning properly – emitting large enough droplets. If the droplets are too small, they can create added humidity, exasperating heat issues.

Providing shade is proven to help mitigate heat stress.  Structures should be open and 8 to 14-feet tall to allow for proper ventilation and should provide between 20 and 40 square-feet-per-animal depending on animal size.  If shade cannot be supplied, simply providing bedding can be of benefit. The ground can trap heat and is capable of becoming up to 20 degrees hotter than the ambient air.

Fresh feed

Heat also impacts feed quality. “Feed rations heat up in the sun and begin to breakdown due to mold, yeast and bacteria growth. Not only are cattle appetites impacted during a heat event, but the feed itself is less appetizing,” Hill explains.

Source: Ralco, which is solely responsible for the information provided and is wholly owned by the source. Informa Business Media and all its subsidiaries are not responsible for any of the content contained in this information asset. 
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