Six Water Myths About Horses Debunked

What you think you know about hydration and cooling might be putting your horse at risk.

Water is among the most critical and misunderstood factors in equine health. Despite how essential hydration and cooling are to performance, digestion, and overall well-being, several myths persist. Let's clear up the confusion and set the record straight.

Myth #1: "Never Spray a Hot Horse with Cold Water"

The truth: This long-standing myth has been thoroughly debunked. In fact, according to Prof. Michael Lindinger, an animal and exercise physiologist at the University of Guelph, in an article for EquiMed, hard work in the heat of the day can raise your horse’s body temperature to dangerous levels. Cold water is one of the safest and most effective ways to reduce a horse's body temperature after exercise. Avoiding it can delay recovery and even lead to overheating, especially in humid conditions.

Tip: Hose your horse generously with cold water, focusing on key areas like the neck, chest, and large muscle groups (shoulders and hindquarters). Scraping the water off immediately for convenience is optional. While water left of the coat will quickly warm from the horse's body heat, it will then continue to cool the horse as it evaporates. 

Bonus Insight: Every horse cools down differently depending on fitness level, coat thickness, age, and metabolism. Pay attention to breathing rate, skin temperature, and overall demeanor, and adjust your cool-down approach to suit each horse.

Myth #2: "Never Let a Hot Horse Drink After a Workout"

The truth: This outdated advice has been widely disproven. Withholding water from a hot, sweaty horse can increase the risk of dehydration and colic. In an article by Tacoma Equine Hospital, water should never be withheld. A horse should be allowed to drink after exercise—with a few simple precautions.

Tip: Offer cool (not icy) water in small sips immediately after exercise. If your horse is very thirsty, let them drink, walk, rest, and drink again. Gradually allow full access to water as they cool down. A dash of electrolytes can help hard workers replenish lost minerals and encourage drinking.

Myth #3: "Horses Prefer Ice-Cold Water in the Summer"

The truth: While cool water may seem refreshing, many horses drink more when the water is lukewarm or close to body temperature—especially in cold weather. According to an article by Richie, researchers at the University of Pennsylvania School of Veterinary Medicine found that horses consumed up to 40% more water per day if they were given water between the temperatures of 45-65 degrees Fahrenheit. Water that's too cold can discourage drinking, which may increase colic risk.

Tip: Monitor water temperature and offer lukewarm water during extreme temps to encourage intake.

Myth #4: "If the Water Bucket's Not Empty, My Horse Must Be Drinking Enough"

The truth: Not always. Horses may slosh or dunk hay in buckets without consuming much. In an article in The Horse by Debra Powell, PhD, PAS, water intake can also vary based on diet, workload, and temperature.

Tip: Know your horse's baseline—most adult horses drink 5–15 gallons daily. Track how much you're filling and dumping to catch subtle changes early.

Myth #5: "Pasture Equals Hydration"

The truth: Grass contains moisture but is not a substitute for fresh water. According to AcreageLife.com, the amount of water in pasture can vary drastically. When horses are on hay, their need for water increases significantly.

Tip: Always offer water, even on lush pasture.

Myth #6: "Salt Makes Horses Thirsty, So You Should Avoid It"

Salt doesn't cause dehydration—it encourages drinking and maintains electrolyte balance. According to an article in PetMD, salt is essential to all animal health. Horses need salt, especially when sweating.

Tip: Offer a free-choice salt block or add loose salt to grain (ask your vet for appropriate amounts based on your horse's workload and climate).

Final Sip of Wisdom

Water is not just a basic need—it's a cornerstone of your horse's health. By understanding and debunking these common myths, you can help your horse stay hydrated and healthy in every season.

When in doubt, offer more water. It's one of the easiest ways to support long-term wellness from the inside out.