1. Dogs can be divided into mini toy dogs, small dogs, medium dogs, and large dogs according to their size;

2. According to their breeds, they can be divided into family dogs, working dogs, hunting dogs, and toy dogs. ;

3. According to the purpose, it can be divided into guard dogs, companion dogs, guide dogs, fighting dogs, working dogs, etc.;

4. According to the length and color of the hair, it can be divided into Short-haired, long-haired, hairless, silky-haired dogs and gray, white, patterned, yellow, black, reddish-brown, black and white dogs;

5. According to the characteristics, they are smart, clingy, non-shedding, Easy to train and other types;

6. There are other classifications, such as terrier, mastiff, and shepherd dog breeds. Parents can choose the breed according to their own preferences.

Common dogs include Poodles, Teddy Dogs, Border Collies, Alaskan Dogs, Labrador Retrievers, Golden Retrievers, Samoyeds, Huskies, etc. Nowadays, only small dogs are basically allowed to be kept in cities. When preparing to raise a dog, it is best for parents to go to the local area to understand the dog-raising policy first to avoid being unable to apply for a dog license.