Do Dogs Really Only Sweat Through Their Feet? The Truth About Canine Sweat Glands.

By Steve Mehler, DVM, DACVS

If you’ve spent any time on social media, you’ve probably heard someone say:

“Dogs only sweat through their paws.”

It’s one of the most common facts repeated online.

The problem?

It’s not entirely true.

Like many things in veterinary medicine, the real answer is more interesting.

Dogs Do Have Sweat Glands

Dogs actually possess two different types of sweat glands, each serving a different purpose.

1. Eccrine Sweat Glands

These are the sweat glands most people are referring to.

In dogs, eccrine glands are located primarily in the paw pads and, to a much lesser extent, around the nose.

When dogs become warm, these glands produce a watery secretion that can help cool the tissues of the feet and improve traction on smooth surfaces.

If you’ve ever noticed damp paw prints on a veterinary exam table or tile floor, you’ve seen eccrine sweat in action.

But here’s the important point:

The amount of cooling they provide is very small.

Unlike humans, dogs don’t have eccrine glands covering most of their body.

That means they cannot rely on sweating to regulate body temperature.

2. Apocrine Sweat Glands

Dogs also have apocrine glands distributed throughout nearly their entire skin.

Despite their name, these glands are not primarily involved in cooling.

Instead, they empty into hair follicles and produce oily secretions that contribute to:

• Skin health

• Hair coat conditioning

• Individual scent production

• Chemical communication with other dogs

These secretions are one reason every dog has its own unique smell.

So while dogs absolutely have sweat glands across much of their body, they aren’t used for temperature regulation the way human sweat glands are.

So How Do Dogs Stay Cool?

Dogs evolved a completely different cooling system.

Panting

Panting is the primary mechanism dogs use to dissipate heat.

As air rapidly moves across the moist surfaces of the tongue, mouth, and upper respiratory tract, water evaporates.

Evaporation removes heat from the body much more efficiently than sweating through small areas of skin.

During heavy panting, blood flow increases to the tongue and oral tissues, allowing even greater heat exchange.

Blood Vessel Dilation

Dogs can also increase blood flow to superficial tissues such as the ears, face, and paws.

This allows excess body heat to transfer into the surrounding air.

Behavioral Cooling

Healthy dogs naturally seek shade, cool flooring, water, and airflow when they become warm.

These behaviors are an important part of thermoregulation.

Why Dogs Overheat More Easily Than Humans

Humans have millions of eccrine sweat glands covering nearly the entire body.

This allows us to lose tremendous amounts of heat through evaporation.

Dogs don’t have that luxury.

Their heavy hair coat further limits heat loss through the skin, making them much more dependent on panting.

Anything that interferes with panting can quickly become dangerous.

Examples include:

• Brachycephalic (flat-faced) breeds

• Obesity

• High humidity

• Respiratory disease

• Excessive exercise

• Confinement in hot environments

Heat Stroke Can Develop Quickly

Once a dog’s cooling mechanisms become overwhelmed, body temperature begins rising rapidly.

Heat stroke is a true medical emergency that can cause:

• Brain injury

• Kidney damage

• Liver injury

• Gastrointestinal damage

• Blood clotting abnormalities

• Cardiovascular collapse

• Death

Early warning signs include:

• Excessive panting

• Bright red gums

• Thick saliva

• Weakness

• Vomiting

• Confusion

• Collapse

Immediate veterinary treatment is essential.

The Bottom Line

The statement that “dogs only sweat through their feet” isn’t quite accurate.

Dogs have eccrine sweat glands in their paw pads that produce small amounts of sweat, but these play only a minor role in cooling.

They also have apocrine sweat glands throughout most of their skin, but these are involved in scent production and skin health—not temperature regulation.

Instead of relying on sweating like humans, dogs evolved to cool themselves primarily through panting, evaporation from the respiratory tract, increased blood flow to the skin, and behavioral adaptations.

Understanding how dogs regulate body temperature helps us recognize why they are so susceptible to overheating—and why preventing heat stroke is far easier than treating it.

As veterinarians often remind owners during the summer months:

If you’re feeling hot, your dog probably is too—but they don’t have the same tools to cool themselves that you do.