Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

At What Age Is a Dog a Teenager? Vet-Verified Facts & Explanation

young dog lying in the meadow

You may have heard that dogs age differently from humans, which is true, but what age does that put their rebellious teenage years? Starting from 6 to 12 months and ending around 18 to 24 months, your dog can be considered an adolescent, or the canine equivalent of being a young teen.

Adolescent dogs can display a lot of the same behavior as teenage humans—emotional outbursts, pushing boundaries, and the early stages of sexual maturity all coincide around the same time thanks to sudden influxes of hormones. Put simply, they are growing up! And just like teenagers, we need to have some understanding of the inner hormonal turmoil your dog is going through when they act out.

Dog development is a fascinating subject for any pet owner, and it is invaluable for letting you know what to expect as your dog grows from a teensy pup to a full-blown adult. Whether you’re interested in how dogs age or just need ways to manage your rowdy adolescent dog, we’ve got you covered. Scroll down as we dig into both of those subjects in more detail.

What Behavioral Changes Should I Expect During Dog Adolescence?

Like human teenagers, adolescent dogs are going through a lot of confusing and overwhelming physical, mental, and emotional changes. They’re more aware of the world and willing to interact, but that comes with some downsides that appear, like bad behavior when your dog can’t always control their first impulse.

Let’s check out some of the biggest behavioral changes you’ll see in your dog as they approach adolescence.

Dog Behavioral Changes During Adolescence:

  • Uncharacteristic defiance: Even well-trained dogs can seem to forget their training and disobey your commands when they hit adolescence. This is normal, and consistent training becomes more important than ever.
  • Destructive impulses: Adolescent dogs need mental stimulation to stave off boredom, or else they’ll resort to natural pastimes like chewing and digging.
  • More energy: Teenage dogs are more physically active and capable of athletic feats than ever, and they’ll need plenty of physical & mental exercise to get out that energy.
  • Reactivity: Even laid-back dogs may see an increase in barking or territorial behavior during adolescence. Use desensitization techniques to temper this. Keep outings calm and pleasant.
poodle dog barking
Image Credit: PAN Michal, Shutterstock

Fear Periods

Dogs go through fear periods in adolescence and this is a normal part of their development. Fear periods begin suddenly and dogs in a fear period are just, well, fearful of things they wouldn’t normally be scared of. They are nothing to worry about; show your dog some gentle love and care and they will get through.

If your dog is going through a fear period try to keep experiences positive as much as possible.

What Are the Life Stages of a Dog?

Dogs have familiar life stages during their shorter lifespans, each with their own unique physical, mental, and emotional changes that slice up a dog’s life. From a new puppy to a graying senior, let’s dig into a bit more about each life stage your dog goes through.

Dog Life Stages:

  • Puppyhood: From birth leading up to 6 months, your dog is a puppy, initially 100% dependent on their mother for survival with gradual physical and cognitive development milestones week by week.
  • Adolescence: Anywhere from 6 to 24 months, your puppy is growing up and learning how to be a fully functional and independent dog, grappling with impulse control, sexual urges, and their newfound ability to do stuff.
  • Adulthood: At around 18 months or so, your dog is fully grown and considered a mature dog. By now, they’ve outgrown most of their defiant teenage habits and they’re as big as they’ll ever get.
  • Senior: Around 7 to 8 your dog qualifies as a senior dog, which may require some diet and exercise accommodations, depending on their breed and health.
a young male siberian husky dog sitting on grass
Image Credit: Rabinger Photography, Shutterstock

How to Manage a Rowdy Adolescent Dog

Puppy blues has nothing on teenage dog blues! If you’re at your wit’s end dealing with your dog’s new teenage attitude, don’t give up! Most dogs have the same troublesome phase, and it can seem like all your training’s gone out of the window.

On the contrary, sticking to a routine and training will be your life raft in this adolescent storm.

Tips for Managing Your Rebellious Teenage Dog:

  • Crate Training: If you haven’t already, we highly recommend crate training for adolescent dogs. It helps to enforce naps and give them a cozy safe space to call their own, ultimately making for a calmer dog.
  • Obedience Training: Training a teenage dog seems hopeless, but trust us, it’s not. Stick with positive reinforcement and a regular schedule to support your pup while they’re growing up.
  • Socialization: While the most critical window is past, continuing to socialize your dog with supervision helps them continue to learn and practice appropriate behavior around other dogs. Socialization is a skill that needs to be reinforced throughout a dog’s life and not just for a few weeks as a puppy.
  • Exercise: Depending on their breed, most adolescent dogs need at least an hour or so of physical exercise. Supplement them with puzzle toys indoors during their downtime for mental enrichment and to discourage destructive behaviors.

Summary

Dogs are teenagers starting at around 6 to 12 months old and ending around 18 to 24 months.. They can be a handful to deal with between the chewing and defiance, but maintaining a rock-solid routine and providing plenty of physical and mental exercise are the best ways to deal with the chaos.

This is a normal part of growing up and will come to a natural end as they mature into adults.


Featured Image Credit: Nikaletto, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.


How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

10 Surprising Tibetan Mastiff Facts: Vet Approved Guide

Though Tibetan Mastiffs are fairly rare in the United States, you’ve probably seen one or two in your time. These giant majestic dogs...

How To Calm Your Dog During a Thunderstorm: 8 Effective Tips

As humans, we usually marvel at the sounds and sights of a thunderstorm, but for many of our canine companions, it is quite...

8 Bernese Mountain Dog Health Problems to Watch For: Vet-Verified Facts & FAQ

Bernese Mountain Dogs, also known as “Berners” among the enthusiasts of this breed, are gentle giants and one of the most attractive Swiss...

What Breed of Dog Was Old Yeller? Famous Movie Dogs

Old Yeller is a beloved classic American book that experienced much success. It depicted post-Civil War frontier life and touched on coming-of-age themes...

More related

250 Cartoon Dog Names for Real-Life Goofy Pups

Searching for the perfect name for your new dog can be very exciting but also a bit overwhelming. After all, there are limitless...

Can Dogs Eat Liverwurst? Vet-Verified Nutrition Facts & Risks

Liverwurst is a type of sausage made primarily of liver, spices, and other ingredients. If that sounds like something your dog might enjoy,...

Alaskan Goldenmute: Breed Info, Pictures, Care Guide & More

The Alaskan Goldenmute is a mixed breed that combines the Alaskan Malamute and the Golden Retriever. It is a lively and energetic ball...

Dogs and Sandy Beaches: Lava’s Visit to Jersey

Hi, I’m Dr. Maja! Read my introduction to learn more about me and my two crossbreed dogs, Lava and Hela. Lava was born...

Keep reading

Can Dogs Eat Custard? Vet Approved Advice

Pastries and sweets are delicacies that us humans enjoy regularly. As curious creatures, dogs will often show interest in our food. It is no secret that dogs will beg you for a taste of whatever delicious snack you’re eating! As...

Can Dogs Eat_Custard

Nom Nom vs. Ollie Dog Food: Our 2026 In-Depth Comparison

With the recalls and controversies surrounding commercial dog kibble, many concerned dog owners started searching for alternative dog food as a response. Over the past several years, fresh dog food subscriptions and delivery services have popped up everywhere, and it...

Dogster_Dog Food Nom Nom VS Ollie

10 Best Dog Foods for Shih Tzus in 2026 – Reviews & Top Picks

Shih Tzus don’t have their own specific dietary requirements, as such, but they are a very small dog breed so they need to get all of their nutritional requirements in a comparatively small amount of food and without too many...

shih tzu dog eating outdoors

Can Dogs Eat Alfalfa? Vet-Verified Facts to Know

Alfalfa is an important grazing plant that feeds livestock worldwide. Many people wonder, can dogs can eat alfalfa? The short answer is yes, alfalfa is a healthy food for dogs. However, there are a few factors to consider before making...

Can Dogs Eat Alfalfa

What Human Foods Can Dogs Eat? Vet-Reviewed Health & Nutrition Guide

Some dogs love to indulge in human foods, especially those that they shouldn’t eat for health reasons. For example, nachos, tacos, pizza, and burgers are all things that canines seem to love the taste of—though they don’t seem to spend...

dog eating out of a bowl

8 Best Dog Foods for Australian Shepherds in 2026: Reviews & Top Picks

If you have an Australian Shepherd, you know they’re a breed of their own. These medium-large dogs are highly energetic and intelligent, so it’s no surprise they thrive with the best food. Since Australian Shepherds are so active, they need...

Australian Shepherd

Can Dogs Eat Cool Whip? Vet Approved Facts & FAQ

Cool Whip is a summer favorite—a perfect topping for all hot weather treats! It is no wonder that our dogs want a dollop for themselves! If your dog got into the goodies or you just want to spruce up your...

Can Dogs Eat Cool Whip

9 Best Dog Foods for Schnauzers in 2026: Vet-Approved Reviews & Top Picks

The key to having a healthy Schnauzer, like any other dog breed, is to ensure that their diet is 100% balanced and rich in the vitamins and minerals they need to thrive. That said, many Schnauzers are susceptible to pancreatitis...

Gray Schnauzer eating food at natural sunlight