Dehydration in horses can be very serious, so being able to spot and prevent it, particularly during the warm summer months, is an absolute must. Making sure your horse has access to a clean, plentiful supply of water at all times is essential, but there’s certainly more you can do to make sure your horse avoids dehydration.
Spotting the signs
At best, your horse’s performance will be affected by dehydration, but in more severe cases it can lead to him exhibiting the symptoms of colic and you’ll need to call your vet.
Dehydrated horses can seem lethargic and produce thick, sticky saliva. Their urine is often darker and their mucus membranes, such as their lips, can become particularly red and congested.
Pinching the skin on your horse’s neck and counting the number of seconds it takes to spring back used to be a widespread method to check for dehydration, but recent research has since suggested that this is unreliable. Instead, checking for tacky gums is a more accurate, easy-to-test indicator of dehydration.
Did you know?
The most accurate way to test for dehydration is to have your vet examine a blood sample for the level of proteins in it – a high level indicates dehydration.
In the summertime
Horses are designed to cool down through sweating. By doing so, they also lose water and body salts, which contributes to dehydration. But, did you know your horse loses water through respiration, too? Therefore, exercising your horse in hot weather, causing him to sweat and increasing his respiration rate, contributes heavily to loss of water and can put him at risk of dehydration.
If you’re taking your horse out competing all day while the weather’s warm, there are plenty of steps you can take to keep him hydrated. Make sure he’s got access to water at all times just as you would at home, and try adding a flavouring such as apple juice if he’s reluctant to drink and if he won’t at all, try a slushy feed such as sugarbeet. Bring plenty with you, as washing him off after his class will help cool him down and reduce his need to sweat and he’s more likely to want to drink water that tastes more familiar to him, too.
It’s not just the summer months and exercise that pose a risk to him. The moisture in grass goes a long way to contributing to your horse’s daily water needs, so when this is scarce over the winter and is replaced with much drier hay, he’ll need to drink much more to stay hydrated. Horses can be put off by ice in their buckets, so you could try insulating his water bucket by putting it inside a tyre and packing round the edges with straw, or bobbing a tennis ball in it to prevent it freezing over.
What you feed can also help guard against dehydration. Again, feeding sugarbeet can help increase his water intake, but consider your horse’s forage ration, too. Haylege has a much higher moisture content than hay and will increase how much water he consumes, but you could also try soaking your hay.
Last but not least, it’s imperative you replace the body salts your horse loses through sweat and respiration – not just the water. You can do this by feeding an electrolyte supplement at the recommended rate.
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