Dr. Voss Warns Aspen Hikers to Watch for Dog Heat Stroke on Smuggler

“Dogs love joining us on these mountain expeditions, but they’re not always good at recognizing their own limits.”

That’s the core problem with heat stroke in Aspen dogs. We assume that because we’re comfortable on a 75-degree hike up Smuggler, our pets are too. We see the blue sky and the dry air and forget that their cooling system is fundamentally different from ours.

Dr. Voss sees this mistake every summer. It isn’t just about dogs trapped in hot cars on scorching pavement, though that’s the classic image. It’s about the athletic dog pushing too hard on a trail, or the bulldog trying to keep up with a fit owner in moderate temperatures.

“Unlike people, dogs don’t cool themselves efficiently through sweating. They primarily rely on panting to release heat,” Voss says. “When temperatures rise or exercise becomes too strenuous, their bodies can struggle to keep up.”

The danger isn’t just the thermometer reading. It’s the intensity of the activity combined with the dog’s specific biology. A speedy run up Smuggler on a sunny afternoon can be dangerous if the dog is overweight, senior, or has underlying cardiopulmonary issues. Brachycephalic breeds — bulldogs, pugs, boxers — are at particularly high risk because their airway anatomy makes it harder to tolerate rigorous activity, even when Aspen’s temperatures feel mild.

Early signs are subtle. You might notice excessive panting, or your dog slowing down and seeking shade. They might drool more than usual or seem less interested in continuing. Their gums can turn bright red. They might appear restless or anxious.

But if you wait for the obvious signs, it might be too late.

As heat stroke progresses, the clinical picture darkens. Dogs may vomit or develop diarrhea. They become weak, stumble while walking, and can eventually collapse. If shock sets in, they might experience seizures or lose consciousness. Immediate veterinary care becomes critical.

So, what do you do if you spot the early warning? Stop the activity immediately. Move the dog to a cool, shaded area. Offer small amounts of water if they’re alert and able to drink. Wet their body with cool water to help lower their temperature, but avoid ice baths or extremely cold water, which can trap heat in some cases.

The misconception that heat stroke only happens in extreme heat is pervasive. It’s a local issue because we live in a place where people assume the altitude and dry air make everything safer. They don’t.

“Even a speedy run up Smuggler on a sunny 75-degree day can be dangerous under certain circumstances,” Voss notes.

It’s about knowing your dog’s limits, not just your own. The enthusiastic dog will often push past their body’s warning signals to keep chasing the ball or running alongside the mountain bike. They override the discomfort because the fun is still there. You have to be the one to recognize when the fun is costing them their health.

If you’re out on the trails this weekend, watch for the panting. Watch for the slowdown. Don’t assume the sun is your friend when it comes to your dog’s internal temperature.

“Even if your dog seems fine after the activity, they may still be at risk,” Voss says, leaving locals with the reminder that the danger doesn’t always vanish when the sun goes down.