As temperatures rise, look for signs of heat stress in your cattle. It’s important to spot heat stress symptoms early to provide effective relief to livestock during the hot and humid summer months.
“Recognizing the effects of heat stress during the hot and humid summer months is important for keeping your cattle healthy and productive,” says Dr. Erika Nagorske, a practicing veterinarian with Southwest Veterinary Services.
Download the free guide How to Manage Heat Stress in Cattle or continue reading below, where we will cover:
Heat stress happens when cows absorb and create more heat than what they can easily eliminate, explains the University of Minnesota Extension. Cattle don’t sweat effectively. They instead rely on their own respiration to cool themselves.
Common signs of heat stress in cattle include:
Excessive salivation
Panting or mouth breathing
Lack of coordination
Trembling
Some of the most common effects of heat stress include:
Change in behavior
Increased susceptibility to disease
Reduced weight gain
Lower milk production
Reduced breeding efficiency
Death
Remember that heat stress is not limited to older animals; it can also affect even young calves. But generally, animals with past health issues will be the first to be affected by heat stress — they will also be the most severely affected.
Outdoor pests like flies can worsen heat stress by aggravating the animals and causing them to crowd together, hoping the flies will affect their neighbors instead of themselves.
You’ll often see cattle gathered together in a pen, stomping and kicking manure trying to fight flies away. As cattle attempt to deal with the fly problem, they will avoid lying down or drinking water. Unfortunately, these behaviors further exacerbate heat stress.
Having an effective fly control program in your arsenal will help curb some of the stress that the heat brings to your animals. Incorporating feed additives is a smart and effective way to curb fly infestations.
Insect growth regulator (IGR) products are fly control feed additives that can disrupt fly larvae from developing in the manure of the treated animal. There is no risk to the animal because the IGR isn’t actually absorbed but instead passes through the animal’s manure. By stopping the pests from developing into biting adult flies, you’ll prevent a potentially expensive impact on your herd.
Luckily, IGR is a very cost-effective fly control approach. Both Sweetlix® with ClariFly® and Sweetlix® Classic Cow-Calf with Clarifly® nutritional supplements contain Diflubenzuron Insect Growth Regulator for continuous feeding to cattle through the fly season. Similarly, ClariFly® Larvicide Premix 0.67% is intended for blending into feeds or supplements as part of an integrated pest management program aimed at reducing fly populations in the treated environment.
Start including fly control additives in your feeding program early in the spring, usually about 30 days before the average daily temperature reaches 65 ℉ or when flies begin to appear. From this point, it’s key to continue using fly control in your feed until 30 days after the first frost in the fall. Continuing treatment in the fall is just as important as starting early in the spring.
Proactive treatment later in the year will help control the next year’s fly population by preventing horn fly larvae from hibernating and surviving the winter (also known as overwintering) below manure pattie before later developing into adult flies.
Learn more about why your fly control strategy should include feed additives here.
When managing and treating heat stress, it’s critical for cattle to have consistent access to the following three things:
As both temperatures and physical activities rise for animals, so does their need for increased water intake. According to Iowa State University, a 1,000-pound animal needs about 1.5 gallons of water per hour.
During the summer months, automatic water tanks may not be able to keep up with your animals’ hydration demand. Adding a stock tank of clean and cool drinking water to a pen for your animals can provide extra hydration and help stabilize their internal temperature.
Help cattle reduce their body temperature by providing proper shade during extremely warm days. Shade from trees and buildings is effective when animals have between 20 to 40 square feet of shade.
Spreading your cattle out to provide them with adequate space during high temperature days will likely prevent them from crowding one another and help with heat abatement.
Also ensure that barns or anywhere else cattle gather have adequate ventilation. This can be as simple as adding fans to provide consistent airflow when necessary. If you do add fans to your ventilation system, it’s important to conduct proper maintenance on your equipment to ensure air flow is not reduced or blocked.
Recognizing the early signs of heat stress will help you better manage cattle health and productivity and hopefully prevent the problem from becoming too serious. FBN offers a broad portfolio of Animal Health products that can help minimize dehydration, including:
If a product requires a prescription, our team can contact your preferred veterinarian on your behalf if you provide their contact information during checkout. Get step-by-step instructions on how to shop FBN’s Animal Health store here.
Find key cattle products and other livestock essentials to keep your herd healthy at FBN.
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