Heat Stress in Horses - Learn the Signs

Read below to learn more about how heat stress affects horses, and some tricks for recognizing, treating, and preventing heat stress this summer. Always be sure to check with your veterinarian for any questions or concerns regarding your horse's health. 



Is my horse suffering heat stress?

Summer is the perfect time to get your horse in peak condition. But as levels of humidity and temperature soar, so do the risks of your horse suffering heat stress. Here's what you need to know to safeguard your horse

THE CAUSE

Your horse's muscles generate heat when he's active, and sweating is his body's cooling mechanism.

High levels of humidity and temperatures can sometimes make the cooling effect of sweating less efficient.

Your horse may become dehydrated, lose electrolytes, or overheat.

The Signs

Signs of Heat Stress in Horses

  • Profuse sweating
  • High rectal temperatur
  • Zero interest in water or food
  • Dry and hot skin
  • Rapid heart rate
  • Anxious behavior
  • Rapid breathing
  • Difficulty moving

What To Do

HOSE HIM WITH COLD WATER

Hose him down the neck, shoulders, and under the belly area to increase heat transfer. Scrape water off his coat within 30 seconds; don't let him drip dry.

Hose horse with cold water

ENCOURAGE HIM TO DRINK COLD WATER

Water must be provided at all times. The average horse will intake 5 to 10 gallons of fresh water per day. Just like humans, different horses crave or need different water amount intakes.

Encourage him to drink cool water

PROVIDE ELECTROLYTES DAILY

Not only will electrolytes help him recover from the salt that is lost in sweat, it will also trigger his thirst, making him want to hydrate more willingly.

Provide electrolytes daily

GIVE HIM ACCESS TO COOL BREEZE

Make sure that he has plenty of ventiliation. Place fans in barn aisles or in front of stalls, and keep the barn doors and windows open to let the air flow. 

Give him access to cool breeze

Weather Watch

83F or less, work as normal

Less than 83° F

Do work as normal with your horse

83F to 86F proceed with caution

83° F to 86° F

Proceed with caution

86F to 91F skip stressful activities

86° F to 91° F

Skip stressful activities

Over 91F consider cancelling plans

Over 91° F

Consider cancelling your plans

When in doubt, Chill Out!
Always consult with your veterinarian


Always consult with your vetrinarian for any questions or concerns regarding your horse's care.

Reference: Ann M. Swinker, Former Extension Horse Specialist

Pennsylvania State University


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