Why dogs take the language?

Unlike humans, dogs have very few sweat glands in the skin, so you can not count on the skin perspiration to regulate their body temperature.

This function is performed by the wheezing, using the language as a radiator, then it is more common to see her off after exercising, or while resting on a hot summer day.

But is not the only reason: other causes are the usual anxiety, fear or excitement.
If the wheezing is excessive, it may be a symptom of a disease worthy of intention to: should then consult the veterinarian.