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 Lick Each Other’s Mouths? Canine Behavior Explained

mother-and-puppy-staffy-1024x681

Since dogs are social animals, they use many different types of interactions. All canine body language, taken in its broadest sense, is intended to promote peace among their pack and avoid tensions rising to dangerous levels and violent confrontations. Does one of your dogs enjoy licking the other’s mouth? Do you ever wonder about the reasons behind this behavior or whether you should try to stop it?

There are many different reasons why dogs lick each other’s mouths. In this article, we’re going to explore mouth-licking behavior in dogs in three cases: puppies licking their mother’s mouth, dog moms licking their offspring, and adult dogs licking each other. We also give you the most effective ways to prevent this behavior if it becomes problematic. Let’s dig deeper.

divider dog paws 2 oct 2024

Puppies Licking their Mother’s Mouth

As puppies develop, they will experience a period known as weaning, which means transitioning from their mother’s milk to more solid foods. In this phase, puppies in the wild lick their mother’s mouth after she returns from hunting with her belly stuffed with meat.

It’s a cue for the mother to regurgitate some predigested food for her starving pups. Domesticated puppies exhibit the same behavior to signal their mom that they are hungry and want to be fed.

Mother Dogs Licking Their Offspring

If your female dog is nursing a litter of puppies, she will lick and clean her offspring, even after they are grown. The licking typically targets the face and neck, but sometimes it can involve the mouth. The majority of puppies will happily receive their mothers’ affection and care.

mother dog and puppy playing
Image By: shanblan4, Pixabay

Adult Dogs Licking Other Dogs’ Mouths

Showing Affection and Bonding

Consider licking the mouth to be the canine version of social kissing. Sometimes, it’s just a way dogs display affection toward others. Studies have shown that licking triggers the release of endorphins in the dog’s brain that make both the recipient and the licker feel good.1 That’s why licking between four-legged friends is such a great bonding tool.

Wild dogs may need to lick their pack mates to ensure the closeness in their group that is necessary for their survival. Of course, domestic dogs don’t need to stick together in packs to survive, but they still have that instinct.

They’re Ready to Play Together

Licking each other’s mouths is often a sign that dogs are ready to play, regardless of whether they are meeting for the first time or are already the closest friends. It frequently goes together with lowered front legs and a wagging tail, indicating a strong desire to play and have fun together.

However, if the dog being licked isn’t up for playing, you should move the other pet away before the licking becomes an obsession and an unpleasant experience.

Expressing Deference

In the wild, many lower-ranking pack members lick the more dominant members to show their respect. This behavior is crucial for maintaining harmony in the pack. When a dog encounters a peer they respect, they might lick that dog’s face to express their deference.

During an intro, a lower-ranking dog might lower their head and extend their tongue to lick the mouth of a more dominant and higher-ranking dog in a gentle way. If the respected dog responds with a lick, it means everything is going well, and they accept that display of deference.

puppy licking a senior dog
Image By: HartOfTheSouth, Shutterstock

divider dog paws 3 oct 2024

Should You Stop This Behavior?

You can allow the licking behavior to go on as long as it’s not too much and both dogs are comfortable with it. However, if you see any of the following happen, you should step in and limit the licking:

  • The dog that is licking continues this behavior for longer and longer lengths of time and seems unable to stop. Also, they tend to perform this behavior with every dog they come across.
  • The licked dog tries to escape, but the other dog pursues them aggressively, so they start to growl, feel uncomfortable, and bite.
  • A dog is attempting to lick the wounds of another dog.

Licking Can Become an Obsessive Habit

For dogs, licking is very relaxing, just like chewing and sniffing. Some four-legged friends become obsessed with this behavior after discovering how good it feels and take mouth-licking to the next level by aggressively doing it to another dog.

You should intercede quickly and firmly in this situation because obsessive licking is unfair to any dog who suffers from it, and over time, it will harm their bond. Even worse, fighting can happen if the dog being licked loses its patience.

friendly dog licking other dog's face
Image By: Stickler, Shutterstock

How to Stop a Dog From Licking Other Dogs’ Mouths

Liking is an appeasement signal, and your dog will tend to lick even more if you scold, so you shouldn’t do it. When you see your pet obsessively kissing the mouth of another, coax all dogs involved to stop with a cheerful voice and give them tasty treats.

With this positive method, you can effectively stop this behavior. Then you might want to physically separate the dogs by placing them in different rooms, putting one inside and the other outside, putting one in a crate, etc.

divider dog paws 3 oct 2024

Conclusion

Dogs licking other dogs’ mouths is quite common in the canine world. It relates to an appeasing experience and is not a problem in most circumstances. If the behavior seems okay with all the dogs involved and doesn’t occur too often, it can be acceptable to continue. However, things get out of control occasionally.

Aggressive licking can be extremely disturbing to some dogs and might lead to a fight, so make sure you keep an eye out for signals that the other dog is upset about the action.


Featured Image Credit: staffy, Pixabay

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

11 Best Large Breed Dog Foods in 2025 – Reviews & Top Picks

Large breed dogs need different nutrition than other breeds out there. They require more joint-supporting supplements, for instance, because their joints carry much...

Cane Corso vs Rottweiler: Which to Choose? (With Pictures)

The Cane Corso and Rottweiler are both bulky dogs with a history of guarding. Although both dogs look a bit scary, they are...

6 Best Puppy Beds in 2025: Reviews & Top Picks

Bringing home a new puppy is an exciting time, but it can also be stressful to round up all the necessities like food,...

Autoimmune Disease in Dogs: Vet-Explained Signs, Causes, Care & FAQ

Dogs of any age and breed are at risk for the development of autoimmune disease. Not every autoimmune disease is created equally, and...

More related

Finn Dog Supplements Review 2025: An Expert’s Breakdown

Have you ever found yourself searching high and low for the perfect supplements to meet your dog’s needs? It can be confusing with...

Can Dogs Eat Cotton Candy? Vet-Verified Facts & Safety Guide

We all want to share our special treats with our dogs, but some things are off-limits. Cotton candy, which is just air and...

Are Cane Corsos Affectionate? Vet-Verified Temperament & Traits

Dominant, territorial, and downright scary, the Cane Corso is a large protective dog that can be aggressive. And it doesn’t exactly fall into...

7 Best Dog Foods for Urinary Health: 2025 Reviews & Top Picks

While urinary health isn’t a very popular subject, it’s critical to your dog’s overall well-being. Kidney stones and urinary tract infections can be...

Keep reading

What Is Hypoallergenic Dog Food Made Of? Vet-Verified Ingredients

If your dog is struggling with symptoms of food allergies (more on those later), your vet may suggest changing to hypoallergenic dog food. But what exactly is hypoallergenic dog food made of? Typically, hypoallergenic diets for dogs are made from...

labrador retriever eating from a bowl

Dr. Marty Nature’s Blend Dog Food Review 2025: Our Expert’s Opinion

Review Summary Dr. Marty is a pet food company founded by long-time veterinarian, Dr. Marty, whose focus for the past 45 years has been on creating healthy and nutritious all-natural foods for dogs and cats. Dr. Marty’s mission is to...

Dogster_Dr. Marty Nature’s Blend Dog Food Review

Tailored Dog Food Review 2025: Recalls, Pros & Cons

Review Summary We all want the best for our canines, including giving them only the freshest, protein-based, high-quality food. Tailored Pet is said to do just that with their direct-to-customer, personalized dog food. The food arrives in a recyclable cardboard...

Dogster_Tailored Dog Food Review

Merrick vs. Wellness Dog Food: Our 2025 In-Depth Comparison

With so many different dog food brands and recipes out there, it can be challenging trying to find the right food for your pup. The good news is that if you’ve narrowed it down to Merrick and Wellness, you’re looking...

Dogster_Dog Food Merrick VS Wellness

Why Does My Dog Walk Away From Their Food? 3 Vet-Reviewed Reasons & What to Do

If you’re noticing that your dog likes to check out their food but doesn’t actually do much eating, it can be extremely frustrating. Or perhaps you’re finding that your dog is taking their food out of their bowl to eat...

dog not eating its food

How to Cook Chicken Liver for Dogs: Vet-Approved Recipes & FAQ

Chicken liver is commonly used in many dog treats and dog food formulas. This delicious organ meat is a great way to add some nutritional value to your dog’s diet 1, so whether you are looking to serve it plain,...

Raw chicken liver in bowl on white table

Can Dogs Have Chia Seed Pudding? Vet-Reviewed Health & Nutrition Guide

Chia seed pudding is a delicious vegan snack made by soaking chia seeds in plant-based milk. It’s often enjoyed as a breakfast or dessert and pairs well with fruit. If you enjoy eating chia seed pudding, you may be wondering...

two fruit with Chia Seed beverages on glass cups

Can Dogs Have Onion Rings? Vet-Verified Facts & FAQ

You love giving your dog a bite of your food every now and then as a special treat, and most of the time, that’s fine. Many human foods are safe (though unhealthy) for canines to consume in moderation. But this...

Dogster-Can-Dogs-Have-Onion-Rings