What is a puppy?
A puppy is typically a dog that is less than 1 year old. (1)
Becoming an adult dog depends on the size, breed, and genetic line of an individual dog. (1)
In general, small breeds mature more quickly than large breeds. (1)
Toy or small-breed dogs may be considered adults at 9 months, while large breeds are often not considered adults until 18 months of age. (1)
Some giant dogs breeds will continue to have bone development until almost 2 years of age. (1)
Resources
1. https://www.petplace.com/article/dogs/vet-qa-parent/vet-qa/when-is-a-puppy-considered-an-adult/
