About dogs, do you really know them? Today, I will tell you about dog knowledge literacy, which will let you learn to understand your dog in 30 seconds.

1. Dogs have almost no sweat glands, and the main heat dissipation sites are on the tongue and pads, so shaving does not help them dissipate heat.

2. There are 13 blood types in dogs, of which 6 are the main blood types, and only 8 blood types meet international standards.

3. Dogs drink water not by licking, but by rolling their tongues back and drinking like a spoon.

4. In fact, dogs also dream, and their owners often appear in their dreams.

5. The longer you get along with the dog, the more similar the owner and the dog will become, whether it is appearance, movement, or various behaviors.