How long is a dog a puppy?

Breed Size. Depending on Max's breed, it can take 1 to 2 years for him to be full-grown. Breeds that weigh less than 30 pounds reach adulthood between 10 to 12 months old. You'll have to wait a year to 16 months if Max weighs between 30 to 80 pounds. read more

There is no magic age when Max has crossed the threshold from puppy to adult. Since smaller dogs develop faster than larger dogs, a tiny Shih Tzu will reach full size before a massive Great Dane. Grown-up size doesn't necessarily equate to grown-up manners. He'll act puppy-ish even when he's full size until he's about 2 years old. read more

Small dogs reach their adult height between 10 to 12 months of age. Small breeds are dogs up to 30 pounds when fully grown. Medium breeds reach full growth between 12 to 16 months of age. Medium breeds are dogs between 30 and 80 pounds when fully grown. Large dogs or large breeds can take as long as two years to reach their final size. read more

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. So, you’ll need to feed a larger dog breed specially formulated puppy food for much longer than you would a smaller dog breed. read more