High temperatures bring added management considerations, particularly for foals, broodmares, and stallions. At Valley Equine, we operate with a clear focus: maintaining the health and productivity of breeding animals through all seasons. Here’s what to monitor during hot weather and how to reduce risk across your program.
Hydration Comes First
Access to clean water is crucial in hot weather. A horse can drink between 5 and 15 gallons per day in moderate heat, as they rely on it to regulate temperature, digest feed and support every metabolic function. This number climbs significantly as temperatures rise, ranging up to 12 to 18 gallons per day. If dehydrated, horses are at a higher risk for colic, electrolyte imbalances, and decreased performance or fertility.
What to do:
- Check troughs and automatic waterers at least twice a day
- Clean out algae, feed, or debris that could make the water less appealing
- Offer salt blocks or basic electrolyte top-dress to encourage increased water consumption
Replenishing What Sweat Takes Away
When horses sweat, they lose significant amounts of sodium, chloride, and potassium, along with smaller amounts of calcium and magnesium. These minerals are essential for hydration, muscle contraction, and nerve function.
In hot weather or during work, losses can become hard to replace through feed alone. Most quality electrolyte supplements are designed to restore this specific balance, with sodium and chloride making up the bulk of the formula, followed by potassium and trace amounts of calcium and magnesium. Replacing these minerals helps maintain proper fluid balance and prevents fatigue, tying up, and other heat-related issues.
Keep Them Well-Fed and Monitored
Unseasonal rainfall across much of Texas this June has changed what’s growing in front of horses, and that matters when it comes to nutrition. Wetter conditions can improve forage volume but may dilute certain nutrients, especially when pastures grow quickly or are overly lush. At the same time, horses expend more energy regulating body temperature in hot, humid weather, while some may go off feed entirely.
That combination can make it harder to maintain condition, particularly in lactating mares, stallions at work, or growing foals. It’s a good time to re-evaluate your ration. Monitor body condition regularly, and take note of any shifts in appetite or manure quality. In some cases, horses may need additional calories or a rebalanced mineral program to account for changes in forage quality. Feed plans should reflect the current conditions, not just what worked earlier in the year.
When Sweating Signals a Problem
As summer temperatures climb and humidity sets in, sweating becomes a horse’s most important tool for regulating body temperature. One of the easiest ways to spot early signs of heat stress is by checking your horse’s sweating pattern. A horse that isn’t sweating on a hot day is cause for immediate concern. This condition, known as anhidrosis, can be serious and requires veterinary intervention.
Signs to watch for include a dry coat, rapid or labored breathing while at rest, lethargy, or an elevated heart rate without visible sweat. On the other hand, excessive sweating without proper recovery can also quickly deplete electrolytes, leading to dehydration and a mineral imbalance, as mentioned above.
Both issues are common this time of year in Texas, where long stretches of heat and humidity can quickly push horses to their limit. Tracking how your horses behave and recover during these conditions can help catch subtle changes early, before they turn into larger problems.
Turnout Smarter
Direct sun exposure during the hottest part of the day can put added strain on horses, especially in late pregnancy, early lactation, or periods of high metabolic demand. Prolonged heat stress can lead to reduced feed intake, delayed recovery, and a drop in milk production. Even when shade is available, not all horses will use it consistently, which makes placement and access critical.
Turnout should be timed with purpose. In extreme heat, early morning or overnight turnout is often the better option, giving horses the ability to move and graze without constant heat load. Well-ventilated shelters or natural cover should be available in every pasture, and for light-colored horses, UV-protective fly sheets can add an extra layer of protection. The goal isn’t to eliminate sun exposure, but to reduce cumulative heat stress and give horses a chance to recover properly between peaks.
Built Into the Program
Summer care isn’t about overhauling your entire program. It’s about staying consistent with the fundamentals: hydration, nutrition, shade, and smart scheduling. Managing heat stress the right way helps protect fertility, keeps foals developing on track, and ensures stallions stay in condition. At Valley Equine, we build these considerations into every part of how we manage the facilities, because the details matter. Summer brings challenges, but with the right preparation, they don’t have to turn into setbacks.
