Anhidrosis is a condition where horses lose the ability to sweat normally. Since sweating is a primary way horses regulate body temperature, anhidrosis can quickly lead to overheating, poor performance, and even life-threatening complications if not managed properly.

Common Causes

• Genetic predisposition in certain horses
• Chronic exposure to hot, humid climates
• Overstimulation or fatigue of sweat glands
• Underlying metabolic or thyroid issues
• Environmental stress combined with intense exercise

Signs of Anhidrosis

• Little to no sweat after exercise or in hot weather
• Dry coat when other horses are visibly sweating
• Rapid breathing or flared nostrils after light work
• High body temperature that does not cool easily
• Lethargy, reduced stamina, or poor performance
• Rough or dry coat texture over time

Management & Supportive Care

• Provide Shade & Ventilation: Keep horses in well-ventilated barns or shaded areas during peak heat.
• Cool Water Therapy: Hose down with cool water, focusing on large muscle groups, then scrape to help evaporative cooling.
• Electrolyte Supplementation: Daily electrolytes (such as Draw It Out® Hydro-Lyte) help restore mineral balance and support hydration.
• Nighttime Turnout: Allow horses to exercise or graze during cooler hours of the evening or early morning.
• Liniment Support: Applying Draw It Out® Gel after workouts can aid muscle recovery without adding heat stress.

Preventative Strategies

• Monitor your horse’s ability to sweat regularly during warm months
• Adjust workload to match weather conditions
• Incorporate electrolyte and mineral support year-round in hot climates
• Work closely with your veterinarian to explore medical management options if sweating does not improve

Why It Matters

Anhidrosis can be frustrating, but with attentive management, many horses continue to thrive. Recognizing early signs, adjusting routines, and using supportive products like Draw It Out® Hydro-Lyte and Draw It Out® Gel can make a big difference in keeping horses cool, safe, and comfortable during hot weather.