Overview
Puppies grow fast, but when do dogs stop growing exactly? It depends on their breed, size, and a few other factors like nutrition and neutering. Most reach their full height in the first year, but some, particularly larger breeds, carry on developing well into their second.
Growth timelines by breed size
How big will my puppy get?
How genetics shape growth
Nutrition makes a big difference
Impact of neutering on growth
Exercise and health matter too
Tracking your puppy’s progress
Weight vs. maturity: why size isn’t the full story
What science says about puppy growth
Medically reviewed by
Published on 15/05/2025 • Reviewed on 15/05/2025