How Do Dogs Cool Off?

The day is hot and sultry, the kind of day when you work up a sweat by just breathing. A few minutes of vigorous activity, and you're swimming within your own shirt. But your dog only pants, with his tongue hanging out by at least a mile, to show he is hot also.

So whose body is better at keeping cool? The answer is, yours. It may be uncomfortable for you to sweat profusely, but it is an efficient method to regulate temperature. When it comes to keeping cool, we have it made in the shade compared to our dogs.

In people, sweat glands help regulate temperature by bringing warm moisture to the surface of the skin, which causes cooling as the water evaporates. Because sweat glands are located all over the human body, cooling takes place over a greater surface area of the skin than it does in dogs.

Dogs do not have the luxury of overall cooling because their bodies have very few sweat glands, and most of those are in the footpads.

Dogs cool themselves primarily by the process of panting and breathing, with the moist lining of their lungs serving as the evaporative surface.

Most people believe that the dog's tongue contains sweat glands, but this is not true. The dog's tongue and mouth are associated with many salivary glands that produce different forms of saliva. Some cooling takes place as the panting dog moves air across saliva-moistened surfaces of the mouth cavity.

Dogs also dissipate heat by dilating (expanding) blood vessels in the face and ears. Dilating blood vessels helps cool the dogs blood by causing it to flow closer to the surface of the skin.

Excessive play on a hot day can lead to overheating (hyperthermia) and eventually to heat stroke. A dog's normal body temperature is within the range of 100.5 to 102.5 degrees Fahrenheit. If his temperature rises to 105 or 106 degrees, he may suffer heat exhaustion. At 107 degrees, heat stroke can occur, with potentially catastrophic consequences. Heat stroke can cause brain damage and even death.

A dog that is overheated will act sluggishly, or perhaps confused. His gums and tongue may appear bright red, and he will be panting hard. The dog may vomit, collapse, have a seizure, and may go into a coma.

An overheated dog is a real emergency situation. Get him to a veterinarian immediately. If possible pour water from the garden hose on him to begin the cooling process. On the way to the veterinary clinic, cover him with cool wet towels or spritz him with cool water. Do not use ice-cold water.

Common Dog Behavior Explained

Communication begins with understanding. If you want to build a better relationship with your dog, you can start by working to understand the meaning and causes behind some of her most common behaviors.

Cesar Millan explains the basics well:

Panting - Because dogs sweat through the pads on their feet, most of their body heat is expelled through their mouth when they pant. It's their primary means of regulating body temperature.

Barking - In nature, dogs bark to raise an alarm at the first signs of possible danger or to herald a new arrival. Barking is an important means of canine communication.

Digging - Digging is an instinctual activity, written deep in a dog's DNA. It is especially strong in terrier breeds. Dogs in natural packs will dig to hide food or to uncover food such as small rodents. A den dug in the cool earth can also provide shelter from the heat.

Jumping up - Though it may seem like play behavior, or an enthusiastic greeting, jumping up is a sign that your dog is attempting to assert her dominance over you. By encouraging jumping up with affection, you are reinforcing the behavior.

Separation anxiety - Dogs live and travel in packs, so it's natural for them to feel anxious when they are separated from their pack-mates. Try taking your dog on a nice, long walk before leaving her alone in the house. Leaving her in resting mode can calm her anxiety.

Once you understand these behaviors, you'll be better equipped to recognize when your pack's needs are not being met! When your dog's needs go unfulfilled, unwanted behaviors begin to emerge. Consider: are you giving Exercise, Discipline, then Affection?