reason 1: heat dissipation by tongue

Dogs are different from humans. They are born without sweat glands all over their bodies, and the way of heat dissipation is very simple, so they can only rely on their tongues to dissipate heat. However, as soon as the tongue sticks out, it will bring out a lot of saliva.

Reason 2: Dog breed heredity

Dog drooling is related to breed heredity. For example, some dogs with wide mouths and big mouths love drooling, such as Bernstein, English Bulldog, Newfoundland Mastiff, etc. People with cleanliness addiction had better not keep these drooling dogs.

reason 3: conditioned reflex

when the dog is excited, it will make the dog drool, which is an instinctive conditioned reflex. When the dog sees the delicious food, it will drool and secrete a lot of saliva. Even we humans can't resist the temptation of delicious food, let alone dogs

Reason 4: Oral diseases

Apart from the variety, there is also a very important factor, which is the oral habits of dogs. If the owner doesn't rinse his mouth and brush his teeth, bacteria may accumulate in the dog's mouth, which may lead to oral problems. At this time, the dog will drool more.