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 an online service where you can talk to a vet online and get the personalized 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

Do Beagles Like to Cuddle? Breed Temperament Explained

Beagles are well-renowned hunters with excellent scent tracking abilities, but can these adorable little scent hounds double as cuddly lap dogs? This is...

Why Do My Dog’s Cysts Keep Filling Up With Fluid? Vet Explanation

Cysts are sacs containing bodily fluids or other material. They can appear more or less anywhere on the body and vary dramatically in...

The Vet Clinic Is Booked for the Day, What Do I Do? 5 Vet Approved Steps & Options

Sometimes, our pets need to go to the vet; it’s just a fact of life. Many times, when our pet requires a vet...

Border Collie Shetland Sheepdog: Info, Pictures, Care Guide & More

The Border Collie Shetland Sheepdog, also known as the Border Sheepdog, is a hybrid breed resulting from pairing a Border Collie with a...

More related

Corded Poodle Dog Breed: Info, Pictures, Origin & History

Poodles come in all shapes and sizes, as well as with various hairstyles. One such hairstyle is known as cording (or, essentially, dreadlocks)....

Who Gets the Dog in a Breakup? 5 Tips for Protecting Your Pup During a Split

When things get serious in a relationship, one of the first commitments for couples is adopting a pet. But sometimes, relationships go south,...

10 Best Foods for Husky Puppies in 2025 – Reviews & Top Picks

Siberian Huskies are working dogs who were bred to pull sleds across the tundra, but they’re also affectionate companions that enjoy being around...

Assistance Dog Day 2025: When & What It Is

Assistance Dog Day is an important holiday devoted to spreading awareness about how dogs improve the lives of countless people living with mobility-limiting...

Keep reading

Can Dogs Eat Millet? Vet-Verified Benefits & Potential Risks

As a dog owner, it’s important to know what foods are safe for your dog to eat. This is especially true if your pooch is one of those that enjoys begging or sharing what you’re eating. When you’re eating healthy...

Can Dogs Eat_Millet

Why Do Dogs Love Peanut Butter So Much? Vet-Approved Enrichment Ideas

When we think of wild canids, we imagine a wolf hunting in a pack and chasing down deer, elk, or moose. Our canine companions are a long way from this lifestyle. Domestication has profoundly impacted dogs. You can make a...

Peanut butter on top of the black dogs nose

8 Best Low Sodium Dog Foods In 2025 – Reviews & Top Picks

There are tons of dog foods out there—so much so that some pet stores have almost half of their floor space dedicated to it. One type of dog food that doesn’t get a lot of coverage, though, is low-sodium dog...

Dalmatian dog eating dry food from a bowl

10 Best Dog Foods for Pomeranians in 2025 – Reviews & Top Picks

Pomeranians have vastly different nutritional needs than dogs of larger breeds. Small dogs have higher metabolic rates than larger dogs and need to take in a sufficient number of calories to stay healthy. You might be surprised to learn that...

Pomeranian eating dry food from green bowl

Can Dogs With Pancreatitis Eat Peanut Butter? Our Vet Explains

A big spoonful of peanut butter is delicious and comforting and certainly a much-loved treat for dogs. Unfortunately for pancreatitis patients, it is high in fat and can put a grumpy pancreas into a full-blown temper tantrum. For dogs that...

Can Dogs With Pancreatitis Eat Peanut Butter

10 Best Dog Foods for Cavapoos in 2025 – Reviews & Top Picks 

The Cavapoo is a popular companion dog that’s a cross between a Cavalier King Charles Spaniel and a Poodle. While this dog breed tends to be pretty healthy, it can be challenging to find the right diet for Cavapoos. Many...

Cavapoo dog indoor

How to Build Muscle on a Dog With Food: 6 Vet Approved Tips

There are several reasons that you may want to build muscle on your dog. Canine athletes often benefit from increased muscle mass, as it helps them go harder and longer. Older dogs often lose substantial amounts of muscle mass, and...

Hunting dog eating

9 Best Foods for Rottweiler Puppies in 2025 – Reviews & Top Picks

If you’re getting a Rottweiler puppy, it’s vital to know the right kind of food to feed them. Because your Rottie will grow up to be a pretty hefty dog, you’ll need to find a specially formulated food for large...

rottweiler puppy done eating