When is a puppy full grown?

Find out here when a puppy is full grown, so you know when is the best time for puppy training and when your pup will stop eating your shoes or shredding your newspaper.

If you ask yourself whether your puppy is full grown or not, are you asking about his size or his mental state of mind? When is the best time to start puppy training? Like with human children: there is a difference between the age their growth stops and the age you feel you are dealing with an adult. Same goes for puppies!

When does a puppy stop growing taller?

Dogs will reach their mature size between 1 and 1 and a half years. Larger dogs can still take a bit longer.

And like with humans during puberty: sometimes the body is a bit out of proportion as some parts of the body grow slower than others.

When is a puppy fully matured?

When it comes to adult dog behavior: the rule of thumb is about 1 year.

Add an extra year when you are raising a border collie. My border collie bit me when he was more than 1 year old during an entire day long training session, although he never bit me again ever. Although the dog looks fully grown, he doesn’t behave fully matured yet (it’s kind of a puppy in a dogs body… and border collies just keep on being playful forever I find).

Catahoula dog litter

Add again another extra year for Catahoula dogs to reach maturity: 3 years all in all.

When does a puppy shows signs of maturity

Your puppy starts his dog life when he stops demanding overly attention and reduces his favorite playtime like:

destroying your shoes or
eating your newspaper before you can read it…

In other words: when you notice you can let your puppy more time alone without finding your house or garden "being struck like with a hurricane", he is surely reaching maturity.

Some dogs keep playful forever (like border collies), but compare it with a football game: little kids just kick the ball, grown ups "play by the rules"… Same goes for puppies versus grown up dogs.

Of course it’s always wise to take your puppy to a dog training school from an early age, but make sure you give your puppy time and space to play!

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