07/31/2018
Some Common Myths
1.Hosing a horse with cold water will cause muscle spasms or a heart attack.
Completely false. Cold water won't hurt the horse one bit, and the cooler the water, the more efficiently it will cool him down.
cold-hosing-horse
2.Letting a horse drink all he wants after exercise will cause founder (or colic
Again, completely false. Water cannot make a horse founder, no matter how much he drinks, or when. (An important exception to this is the horse that is severely overheated. See sidebar "Heat Can Kill.")
3.Cold water will cause founder or colic.
It won't. But studies have shown that horses given warmish water will drink more. So it's a good idea to draw a bucket of water and let it warm up a bit if your water supply is very cold.
4. Horses cool out faster when wearing a cooler.
Nonsense. Never put any kind of cooler on a horse in hot weather. When you're hot, do you crawl under a blanket or take off extra clothes? The same thing goes for your horse. You want his body heat to transfer to the air and blow away, not be trapped close to him.
5.Never clip a horse because his hair helps him cool out quicker.
Like #4, this is also false. Common sense alone will tell you that the less you have between skin and air, the quicker cooling will occur.
Keep Cool with Salt
Maintenance horses require 1-2 ounces of salt per day to meet their requirement for sodium and chloride under normal temperature conditions. This may increase to 4-6 ounces of salt per day in hot humid conditions or with added exercise. Inadequate salt in the diet can result in abnormal eating behavior such as licking or chewing objects that have salt on them or licking/eating dirt. Water intake may also decrease, increasing the risk of impaction colic.
Heat Can Kill
Horses overworked in the heat can develop body temperatures of 105º or higher and risk damage to their brain, muscles and internal organs - even death. Overheating is possible any time the temperature and humidity combined are more than 150 (e.g., 80º temperature and 70% humidity, 100º temperature and 50% humidity, etc.), so use caution in those instances. When you add "normal" summer temperature and humidity percentage, they often total at least 150. You may be tempted to ignore this advice, thinking that you've frequently worked your horse hard when the total is over 150. But veterinarians tells us that they see a fair number of horses collapsing from the heat every summer, or at least having low-level heat exhaustion.