Saturday, 21 December 2013

Canine Hyperthermia: Making Sure That Your Dog Stays Cool

We may love the heat, but it’s hard on our canine companions. Whether you live in Arizona or Alaska, rising temperatures affect your dog during the summer. And with global warming driving average temperatures up, the situation won’t get any easier for our four-legged friends.
Dogs have defective cooling systems. They lose heat only through respiration and their paws, and they don’t perspire like we do. Like any heat producing engine, they radiate heat to the environment. This is a great system for an animal that evolved for life in the taiga and the Ice Age, or cold deserts at night. It’s not so great for a sled dog living in Florida.
Cool solutions
Water, water, water
Your dog should always have plenty of fresh cool water available. If you’re taking your dog for a walk, there are some very neat new devices for carrying water for your dog.

Don’t overwork him
Use a good quality cooling jacket. If you’re going to work a dog in warm weather, take a good cue from the best agility and search and rescue handlers: be prepared with lots and lots of water, a good cooling jacket that works properly, and perhaps a cool pond in which to quickly dissipate heat.
Provide shade whenever possible
My dog Buddy’s unwillingness to come out of the shade for a walk was what gave me a clue to develop my own cooling jacket. Shade represents reduced heat influx (though not entirely) and reduces strain on the dog’s system.
Air movement is good, and more is better
A breezy, shady spot on a warm day helps a dog even though he doesn’t perspire. Dogs can lose heat through radiation, helping offload some work from his primary cooling systems.
Give him a dip in a pool or stream
Water on the body allows for evaporative cooling. But that cooling mechanism works well only if airflow is plentiful and the heat being absorbed by evaporation comes from the dog, not the environment. One of the problems with older style towel wraps and chamois is that they turn into a sauna underneath because they emphasize water at the exclusion of air. Evaporative cooling is about 80% airflow, 20% water.
Watch for the slightest signs of heat stress
Keep in mind, though, that a dog may already be suffering from heat stress before these symptoms of distress appear.
• Wide eyes
• Intense, rapid panting
• Excessive salivation
• Staggering and weakness
• Collapse
Use a good quality cooling jacket