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.

Why Do Dogs Wag Their Tails? 6 Vet Reviewed Reasons

Happy,Golden,Retriever,Outside,On,The,Lawn

Most people assume that dogs will wag their tails when they’re feeling happy. However, dogs actually use their tails to communicate and express an even wider range of emotions. They can wag their tails when they’re feeling positive emotions as well as when they’re feeling negative emotions.

Looking at just a dog’s tail wagging won’t definitively tell you how they’re feeling. You must look at the rest of their body language to determine if they’re feeling happy, agitated, or nervous. We’ve listed several possible reasons your dog might wag their tail and how you can figure out how they’re feeling.

divider dog faces oct 2024

The 6 Reasons Why Dogs Wag Their Tails

1. Happiness

Golden Retriever Wagging Tail
Image Credit: Hollysdogs, Shutterstock

One of the most well-known reasons why dogs wag their tails is because they’re feeling happy and are in a good mood. Dogs will wag their tails when they notice something that they like. This can include seeing their favorite people walk into the room, hearing a bag of treats opening, or smelling delicious food wafting from the kitchen. When dogs are happy, their tails will usually be high up and wagging.


2. Nervousness

Sometimes, dogs will wag their tails when they’re feeling anxious or nervous. Again, the more intense the wagging, the more intense the emotion often is. Dogs will also engage in many other behaviors to express their nervous energy. Some dogs will pace around or be shaking. They can try to hide from view and make themselves appear smaller by tucking their tail and curling up.

Dogs experiencing more intense anxiety may urinate indoors, even if they’ve been potty trained. They can start to become depressed or more irritable and begin to lose interest in eating and doing activities that they normally enjoy.


3. Curiosity

Curious Basset Hound Puppy
Image Credit: Melinda Klein, Shutterstock

Dogs may wag their tails when something has piqued their interest. You may notice your dog’s tail wagging when you’re going on a walk, and they suddenly pick up an interesting scent trail. The more curious they are about the smell, the faster their tail will wag.

If something has caught your dog’s curiosity, your dog’s ears may also perk up and be more alert. They might tilt their head to adjust their sight on something or get a better hearing of a strange sound.


4. Alertness

Dogs that are alert often have their tails sticking straight out and wagging slightly. They’ll take time to observe their surroundings with all their senses. You’ll notice their ears are perked up and pointing forward, and their eyes are focused and wide open. They’ll be standing with their weight evenly distributed on all their legs and will look ready to react to whatever’s caught their interest.


5. Playfulness

newfoundland dog playing a ball with owner at the park
Image Credit: Roman Zaiets, Shutterstock

Dogs are usually happy when they’re playful, so it’s no surprise that their tails will often be wagging. Some dogs may wag their tails back and forth to entice others to play with them and chase them.

Dogs that want to play will usually play bow. They can have their mouths open, and it’ll look like they’re smiling. They might even growl playfully if they’ve gotten themselves into a wrestling match.


6. Stress

Dogs can start to become restless and wag their tails when they’re feeling stressed or agitated. Stressed out dogs can begin to pace around, whine, or bark. Some dogs may yawn, pant, or lick their lips when they’re stressed out. Their ears are usually tucked close to their heads, and they can also have raised hackles.

If your dog is showing signs of stress, we suggest you speak to a vet.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

divider dog faces oct 2024

Do Dogs Wag Their Tails on Purpose?

Dogs can control their tail movement,  however, tail wagging is often an instinctual behavior that dogs may unconsciously engage in when they’re feeling certain emotions. So, a dog’s tail often becomes a reliable source of information about how a dog is feeling. Of course, you have to observe other body language cues to determine their exact emotion.

Dogs may also wag their tails to communicate from a distance. It’s easier to notice a tail wagging from far away, and it can signal to other dogs whether a dog is feeling friendly or aggressive.

You are free to use this image but we do require you to link back to Dogster.com for credit

divider dog faces oct 2024

Conclusion

A dog’s tail is a communication tool, and it’s used to express many different emotions. So, make sure to pay attention when your dog is wagging their tail. They’re communicating with you, and reading the rest of their body language can help you determine how they’re feeling. Being mindful of these types of canine body language cues ultimately helps you understand your dog better and know how you can best care for your dog’s needs.


Featured Image Credit: Aaron Pletta, 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

Can Dogs Eat Couscous? Vet-Reviewed Nutrition Facts & FAQ

Couscous has become an increasingly popular grain in people’s diets because it’s delicious, versatile, and healthy. If you make couscous often and have...

Why Do Dogs Bark At Fireworks? 6 Reasons & How to Help (Vet Reviewed)

Many dog owners dread certain holidays throughout the year because of the use of fireworks during those times. Independence Day, Labor Day, and...

Treeing Walker Coonhound Dog Breed: Info, Pictures, Traits, & Care

The Treeing Walker Coonhound is a relative newcomer to the canine world but was formally recognized by the American Kennel Club (AKC) in...

International Bull Terrier Day 2026: When It Is & How to Celebrate

The Bull Terrier is widely loved for its affectionate personality and devoted loyalty, so it only seems right to give them a day...

More related

Ask Dr. Paola- Mange, Respiratory Health & Enrichment (July 21, 2025)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

How to Make Your Dog Famous: 7 Tips to Stardom

Dogs are popular on the internet, and you can find many famous dog influencers and stars with large fanbases. While some dogs become...

How Many Puppies Can a Shih Tzu Have? Vet-Verified Pregnancy & Litter Information

The Shih Tzu is a popular toy dog breed. They are friendly, generally sweet-natured, and elegant. Unlike a lot of toy breeds, which...

Histiocytoma in Dogs? What It Is, Causes & Signs (Vet Answer)

Dogs can get all sorts of “lumps and bumps” that grow on them. Some occur in younger dogs, while most develop notice as...

Keep reading

Merrick Dog Food Review 2026: Recalls, Pros & Cons

Review Summary Garth Merrick founded Merrick Pet Care in 1988 out of a desire to create homemade food for his dog, Gracie. He crafted his recipes in Hereford, Texas, where the company still has offices. Merrick prides itself on producing...

Dogster_Merrick Dog Food Review

How to Keep Flies Away From Dog Food – 10 Great Ideas

It’s summertime, and that means hot days and lots of flies. If you are like most people, you probably don’t enjoy sharing your food with pesky insects. Flies can be a nuisance, but they don’t have to be. Plenty of...

flies on dog food

Ethoxyquin in Dog Food: Why Is It Controversial? Vet-Verified Facts

Dog owners, brace yourselves! The food your beloved canine companion eats on a daily basis might contain a controversial ingredient – ethoxyquin. This synthetic antioxidant, commonly used as a preservative in dog food, has sparked heated debates among pet enthusiasts...

man checking dog food label

Can Dogs Eat Anchovies? Vet Approved Nutrition Facts & FAQ

Though they’re definitely not for everyone, anchovies can be a great addition to sandwiches, pizzas, and soups. They’re frequently found in sauces and dressings and can even be grilled like sardines or mackerel. Though they have a terrible reputation, anchovies...

Can Dogs Eat Anchovies

SquarePet Dog Food Review 2026: Recalls, Pros & Cons

Review Summary SquarePet dog food is produced and sold by a small, family-owned American company. The recipes are all manufactured exclusively at the company’s plant in Minnesota. SquarePet is known for its focus on simple recipes and developing non-prescription specialty...

Dogster_SquarePet Dog Food Review

10 Best Dog Foods for English Bulldogs in 2026 – Reviews & Top Picks

English Bulldogs are wonderful pets, but they do have some predispositions toward certain conditions that make choosing the right food for them very important. Whether your English Bulldog struggles with obesity, dental disease, or just struggles to pick up small...

English Bulldog Eating

Inception Dog Food Review 2026: Recalls, Pros & Cons

Review Summary Inception Pet foods is a brand that produces wet and dry food for cats and dogs with animal or fish protein as the first two ingredients in each recipe. Inception is owned by Pets Global, which is based...

Dogster_Inception Dog Food Review

Can Dogs Eat Avocado? Vet-Reviewed Health Concerns

Avocados are one of the most popular foods in modern America. Avocados have appeared everywhere, from being eaten raw for breakfast to appearing on toast, being added to hamburgers, and continuing to be a feature of guacamole. Many people love...

Can Dogs Eat Avocado