"Mangy dog" is a curse word used to describe those who are cunning, unreasonable and unreasonable. But the mangy dog ​​also means a mangy dog, and its name is based on its appearance. The skin of a mangy dog ​​is very loose, and the skin on the face is piled together.

The formation of a mangy dog ​​has a lot to do with the environment in which the dog lives. If the environment is damp, dirty, and not ventilated, then there will be many The appearance of mites turns the originally soft-coated dog into a mangy dog.