When do dogs stop growing?

Sometimes we wish that puppies would stay small forever, but it’s inevitable that they will grow up to be a mature dog. If you have a puppy, especially a mixed breed, you may wonder when your dog will reach its fully grown size. Is he done growing? Will he get even bigger?

chihuahua puppy

Truth be told, the answer varies by the size of the dog. Generally, smaller dogs will reach their full-grown size at a younger age than larger dogs.

It’s safe to say that small dog breeds (Chihuahuas) have reached their full size by 10 months to 1 year of age.

Small-medium dog breeds (Toy Poodles, Beagles, Miniature Schnauzers) will be finished growing by about 12-15 months and will have reached their full weight by about 18 months.

Medium-large dog breeds (Collies, Labrador Retrievers, Boxers) are fully grown by about 18 months and at their full weight by about 2 years of age.

Neopolitan mastiff puppyGiant dog breeds (Great Danes, Mastiffs) may take up to three years to reach their full weight, though they should be fully grown into their paws by about 18 months.

A good indicator for giant dog breeds is the size of their paws. When they are puppies, big dog breeds appear to have over-sized paws that look disproportional to the rest of the body. However, after fully “growing into” their paws, they will look better proportioned.

While the specific timeline will vary by each individual pet, this should give you a good guess as to when your puppy will be fully grown.

Do you have any tips or tricks that let you know when a dog has stopped growing?

About Stacy @Trupanion

Stacy Kowalchuk is a dog mom to her rescued Whippet-mix, Ellie. During the week, you can find Stacy surfing (the internet, that is) and managing Trupanion's presence in the social media world. In her free time, Stacy likes to bake, especially cupcakes! To balance her culinary affinity, she also likes to stay active, especially with activities that include her dog such as hiking and going to dog parks.

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