Summer Safety for Giant Breeds: How to Keep Your Big Dog Cool, Comfortable, and Out of Danger

Summer brings longer days, more adventures, and plenty of opportunities to enjoy the outdoors with your dog. But for giant breeds, the rising temperatures can quickly turn dangerous. With more body mass to manage and often darker coats that absorb heat, big dogs are especially vulnerable to overheating.

Here’s what every giant breed owner needs to know to keep their dog safe and cool this summer.

Why Big Dogs Overheat Faster

Giant breeds like Great Danes, Saint Bernards, Mastiffs, and Newfoundlands have different heat tolerances than smaller dogs. More body mass = more heat retained, and dark coats absorb more sun, heating them up quicker.

Combine those with their naturally laid-back temperaments (they’re not quick to complain!) and you’ve got a recipe for potential heatstroke if you're not paying close attention.

Don’t Be Fooled by Energy Levels

Just because your big dog wants to stay outside doesn’t mean they should. Many giant breeds are people-focused and eager to be wherever you are. That’s why we, as their humans, have to step in and make the call to head inside.

Signs of Overheating in Big Dogs

Early Warning Signs – Time to Head to the Shade

• Heavy or excessive panting

• Drooling more than usual

• Slowing down or seeming tired

• Lying down and refusing to move

• Seeking out shade or cool surfaces

These are your cues to get your dog to a cooler place, offer water, and allow them to rest. You can also help cool them off faster by rinsing their belly with cool water.

Escalated Symptoms – Time to Call the Vet

• Bright red or pale gums

• Rapid or irregular heartbeat

• Vomiting or diarrhea

• Disorientation or stumbling

• Collapse or seizures

Tips to Keep Your Big Dog Cool All Summer

1. Prioritize Shade and Ventilation
Whether you're at home or out on a walk, make sure your dog always has access to shade. Indoors, use fans or AC to help regulate the temperature.

2. Time Outdoor Activities Wisely
Stick to early mornings or late evenings when temps are cooler. Midday heat is especially dangerous for giant breeds.

3. Avoid Hot Pavement
If it’s too hot for your hand, it’s too hot for their paws. Walk on grass or dirt paths when possible.

4. Never Leave Your Dog in a Parked Car
Even with the windows cracked, temperatures skyrocket in minutes. This can quickly become fatal for large dogs.

5. Provide Cool, Fresh Water at All Times
Hydration is crucial. Bring a travel bowl on outings and keep a full water bowl at home.

6. Watch Activity Levels Closely
Big dogs often won’t stop themselves, even when they’re overheating. It’s up to you to enforce rest periods.

Pro tip: Use cooling mats, damp towels, or dog-safe kiddie pools to help them chill out.

The Bottom Line

Hot weather can be a great time for outdoor fun—but it comes with risks for large and giant dogs. Staying informed and proactive is the best way to ensure your big dog has a safe, fun-filled summer.

Let them romp, sniff, and enjoy the season—but always keep comfort and safety first.

Because when it comes to big dogs, a little prevention goes a long way—and might even save a life.