Life-stage transition for dogs Puppies mature into adults at a different time, which means that a large dog breed will mature into an adult at about 15 months, while smaller breeds will be puppies for only 9 months.
At what age is a dog no longer a puppy?
Although all puppies are officially considered adult dogs once they reach one year old, puppies continue to grow in height and size while their bones are still developing, which takes anywhere from 6 to 24 months.
Is 10 months still a puppy?
Your puppy will become an adult dog at the following ages: Extra-small breed (10 pounds): eight months. Mini breed (10-25 pounds): 10 months. Medium breed (26-55 pounds): 12 months.
What is the hardest puppy stage?
Most puppies will go through a very trying stage when they turn about 5 months of age. Dogs often don't out grow that teenager phase for 2-3 years depending upon the breed. Many experts agree that the most challenging time is between the ages of 8 months to about 18 months.
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