Heat Stroke in Dogs and Horses: A Preventable Summer Emergency
As temperatures rise, so does the risk of heat-related illness in our pets. Every summer, veterinary clinics see cases of heat exhaustion and heat stroke that could have been prevented with a little awareness and preparation. Heat stroke is a true medical emergency that can rapidly lead to organ failure, shock, and even death if not treated promptly.
At Pet Vet Animal Clinic & Mobile Practice, we want to help pet owners recognize the signs of heat stress and take steps to keep their furry family members safe.
What Is Heat Stroke?
Heat stroke occurs when an animal’s body temperature rises to a dangerous level and they are no longer able to cool themselves effectively. Normal cooling mechanisms become overwhelmed, causing damage to the brain, heart, kidneys, liver, and other organs.
Heat stroke can occur surprisingly quickly—even on days that don’t seem excessively hot.
Heat Stroke in Dogs
Dogs primarily cool themselves by panting. Unlike humans, they have very few sweat glands, making them more susceptible to overheating.
Common Causes of Heat Stroke in Dogs
- Being left in a parked vehicle
- Excessive exercise during hot or humid weather
- Lack of access to shade or fresh water
- Poor ventilation
- Obesity
- Thick hair coats
- Underlying heart or respiratory disease
Signs of Heat Stress in Dogs
Early signs include:
- Excessive panting
- Increased heart rate
- Bright red gums
- Restlessness
- Excessive drooling
As heat stroke progresses, dogs may develop:
- Weakness or collapse
- Vomiting or diarrhea
- Disorientation
- Difficulty breathing
- Seizures
- Unconsciousness
Why Brachycephalic Dogs Are at Higher Risk
Brachycephalic (“short-nosed”) breeds face a significantly increased risk of heat stroke because their shortened airways make it harder to cool themselves through panting.
French Bulldogs, English Bulldogs, Pugs, Boston Terriers, Shih Tzus, and Boxers are among the breeds most commonly affected.
These dogs often have:
- Narrow nostrils
- Elongated soft palates
- Smaller airways
- Increased effort required to breathe
Because panting is their primary cooling method, these anatomical differences can make even moderate temperatures dangerous.
Extra Precautions for Brachycephalic Dogs
- Exercise only during cooler morning or evening hours.
- Avoid strenuous activity on warm days.
- Never leave them outside unattended in the heat.
- Always provide access to air conditioning when possible.
- Monitor closely for excessive panting or noisy breathing.
For some brachycephalic dogs, temperatures above 75–80°F with high humidity can be enough to trigger heat-related distress.
Heat Stroke in Horses
Horses are also vulnerable to heat stress, especially during exercise, transportation, and periods of high heat and humidity.
Unlike dogs, horses rely heavily on sweating to cool themselves. When they cannot dissipate heat effectively, their body temperature can rise rapidly.
Risk Factors in Horses
- Intense exercise
- High humidity
- Poor air circulation
- Long trailer rides
- Obesity
- Dehydration
- Lack of acclimation to hot weather
Signs of Heat Stress in Horses
- Excessive sweating or, in severe cases, cessation of sweating
- Rapid breathing
- Elevated heart rate
- Lethargy
- Weakness
- Muscle tremors
- Decreased performance
- Stumbling or incoordination
- Collapse
Preventing Heat Stress in Horses
- Ensure constant access to fresh water.
- Provide shade whenever possible.
- Offer salt and electrolyte supplementation when appropriate.
- Schedule riding and training during cooler parts of the day.
- Allow horses time to acclimate to increasing temperatures.
- Use fans and adequate barn ventilation.
- Cool horses thoroughly after exercise with cold water and scraping.
What To Do If You Suspect Heat Stroke
For Dogs:
- Move the dog to a cool, shaded, or air-conditioned area immediately.
- Apply cool (not ice-cold) water to the body.
- Place wet towels on the paws, belly, and groin area.
- Offer small amounts of water if the dog is alert.
- Seek veterinary care immediately—even if your dog appears to improve.
For Horses:
- Stop exercise immediately.
- Move the horse into shade or a well-ventilated area.
- Apply cold water continuously to the body.
- Use fans if available.
- Contact your veterinarian if signs are severe or not improving rapidly.
Do not wait for symptoms to worsen. Internal organ damage can continue even after body temperature begins to decrease.
Prevention Is the Best Medicine
Heat stroke is one of the most preventable veterinary emergencies. By providing shade, fresh water, proper ventilation, and limiting activity during hot weather, owners can greatly reduce the risk.
This is especially important for brachycephalic dogs, senior pets, overweight animals, and horses working in hot or humid conditions.
If you have questions about keeping your pets safe this summer, or if you are concerned your pet may be experiencing heat stress, contact Pet Vet Animal Clinic & Mobile Practice right away. Early intervention can save lives.
Stay Safe This Summer
Remember: If it’s too hot for you, it’s probably too hot for your pet. A little caution today can prevent a life-threatening emergency tomorrow. 🐾🐴☀️