Drooling. A dog's nervous system is activated by stress and causes drooling and frequent lip-licking or "lip-smacking." This is also seen when a dog has nausea and may have something to do with activation of the gastrointestinal tract by the nervous system. Compulsive Behaviors. Drooling is a form of heat control for dogs called evaporative cooling. So, the answer is yes! Drooling can be normal and in response to the dog's emotions or environment. But there are times when drool is not normal. When excessive salivation occurs, the condition is called ptyalism. For instance, a dog with an infected tooth or gums can WEIGHT: Standard: 40 to 70 pounds; miniature: 15 to 18 pounds; toy: 5 to 9 pounds. COAT AND COLOR: Curly, dense single coats in a variety of solid colors including white, black, grey, brown, and apricot. LIFE EXPECTANCY: 10 to 18 years. 16 Big Dog Breeds That Don't Shed. 02 of 32. lLgQ.

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