Dogs (Latin Canis lupus familiaris) belong to the phylum Chordata, the subphylum Vertebrates, the class Mammalia, the subclass Eutheria, the order Carnivora, the suborder Schizopoda, and the family Canidae.

Also known as "dog" in Chinese, dogs are distributed all over the world. The history of human dog-raising can be traced back to about 10,000 BC. Domestic dogs in Northeast China have appeared in the late Paleolithic Age.

1. Ultra-small dogs: (4 types in total, standard height 25cm, weight less than 4kg)

2. Small dogs: (50 species in total, standard height 25-40cm, weight 4-10kg)

3. Medium-sized dogs: (54 species in total, standard height 41-60cm, weight 11-30kg)

4. Large dogs: (50 species in total, standard height 61-70cm, weight 31-40kg)

5. Extra large: (20 types in total, standard height is above 70cm, weight is above 40kg)

According to the American AKC standards, this list only includes purebred dogs recognized by them.

No matter what breed the dog is, pure or not, what matters to the owner is the love and loyalty. So if you were to rank dogs according to their IQ, what order would they be in? There is a reason why the villain Teddy (VIP) ranks second!

For those who like dogs, don’t forget to follow us!