What is the standard for dividing dogs and dogs?

A. 1

A young dog is called a dog, and a grown-up dog is called a dog.

Gentleman 9 years ago 0

OK

A. 2

Little Dog: Puppy
Adult dog: dog

Gentleman 9 years ago 0

OK

A. 3

A young dog is called a puppy, just as a young cow is called a calf.
Just because the word dog is not good, there are cases where small dogs among grown dogs are called dogs.

Gentleman 9 years ago 0

OK