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 Does My Dog Smell Like Fish? 4 Vet-Verified Causes

Smelly Dog

Dogs are notorious for sometimes emitting pretty bad odors. They love to roll in the strangest of things, resulting in “interesting” smells for their owners. Among the variety of bad smells that you may have experienced coming from your pooch, a fishy odor has got to be the worst.

What makes it even stranger is if your dog has had no access to fish at all, yet still they manage to smell like it. How is this possible? There are several possible reasons.

divider dog paws 3 oct 2024

The 4 Possible Reasons Your Dog Smells Like Fish

1. Anal Glands

Your pooch has anal glands or sacs on either side of their anus, which are responsible for the pungent odor that your dog uses to mark their scent. If your dog is frightened, they may express some of this anal gland secretion — which is perfectly normal — and this can have a fishy odor. If the smell persists, however, there may be something more serious at hand.

Anal sac disease is fairly common in dogs, especially in smaller breeds. The disease is caused by the anal sacs becoming impacted or plugged due to inflammation of the ducts, causing swelling and discomfort for your pooch. This slowly secreted anal fluid is ideal for the propagation of bacterial growth. Also, the bacteria in your pooch’s feces can easily come into contact with the ducts and cause infection. The disease is usually accompanied by a very fishy smell and hard, painful anal glands, and you may notice your pooch having difficulty defecating.

You’ll need to take your dog to a vet who will manually empty and then clean the infected anal glands, which should resolve the odor. Your pooch may also need a course of antibiotics to prevent any further infections.

anal sacs of a dog
You are free to use this image but we do require you to link back to Dogster.com for credit.

2. Urinary Tract Infection (UTI)

If your dog’s urine smells like fish, it may be due to a UTI. This infection in the urinary tract can lead to an overload of bacteria that causes a foul odor, and you’ll need to take your pooch to a vet right away, where they’ll likely be put on a course of antibiotics. Once the infection clears, the smell should go away.

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


3. Dental Issues

Even if your dog hasn’t eaten any fish recently, their breath can still smell somewhat fishy. This is usually caused by periodontal disease, an issue caused by inflammation or infection of your dog’s gums. If you’ve noticed a large amount of tartar on your dog’s teeth or red, inflamed gums, they may potentially have periodontal disease, which could be causing the smell.

Your dog may also have a broken or abscessed tooth, and the resulting infection can give off a somewhat fishy odor. It could also be that there’s food stuck in their teeth that is causing the smell. Either way, you’ll need to brush your dog’s teeth with an enzymatic toothpaste to maintain their dental hygiene and consult with a veterinarian who can rid your dog’s teeth of infection and plaque and thus, the smell, often through a dental procedure.

vet is brushing the teeth of a Welsh corgi
Image Credit: Masarik, Shutterstock

4. Yeast Infection

The fishy smell coming from your pooch could be due to a yeast infection of some kind, especially in dogs with excess skin and folds like Bulldogs. These folds of skin can quickly become moist and infected, which can cause a smelly, fish-like odor. Yeast infections can also occur inside the ears, around the eyes, or in between the pads of your dog’s toes. Regular daily skin fold hygiene is crucial in keeping the area clean and infection free using special veterinary chlorhexidine wipes or a gentle bath with warm water and specialized dog shampoo. In case of skin redness, discharge, discomfort or malodor, it’s important to consult your vet promptly.

yeast infection on dog
Image Credit: ThamKC, Shutterstock

Dogster divider_v1_NEW_MAY_24_

Conclusion

If your dog smells like fish, the first thing to make sure of is that they have not gotten into any fish! Once you’re sure that they haven’t stolen a tin of anchovies from somewhere or rolled into something stinky, there are a few physical checks that you’ll need to perform, as your dog may have a skin yeast infection of some kind, anal gland, urinary or possible dental issues. Once you’ve found the cause of the odor, it’s important to get them seen by your vet so they can have appropriate and prompt treatment.

Related Read:


Featured Image Credit: UfaBizPhoto, 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 Dogs & Ferrets Get Along? Vet-Approved Introduction & Safety Tips

Dogs are one of the most popular pets in the world and ferrets, for their part, are gaining more and more popularity as...

How Much to Tip a Dog Groomer in 2026: Facts & Considerations

Dog groomers work hard to ensure our pups look their best. They make sure our pups are nice and clean, don’t have mats...

What to Do If Your Dog Eats Glass & How Vets Will Help

It happens in a blink. One minute you’re cleaning up a broken jar, and the next your dog swoops in like a furry...

Fungal Infections in Dogs: Signs, Causes & Treatment (Vet Answer)

A number of fungal infections can affect our canine companions. Some of these fungal infections are superficial or “local” diseases, such as ringworm...

More related

How to Keep Dogs Safe Around Water: 15 Essential Vet-Approved Tips

With the arrival of summer comes so many more activities to do with your pet. Walks are great, but swimming is a lot...

How Much Does Dog Grooming Cost in Canada? 2026 Price Guide

Grooming is an essential part of dog ownership and routine maintenance. Proper grooming will keep your pup looking their best and keep them...

10 Best Low-Protein Dog Foods in 2026 – Reviews & Top Picks

Protein is an essential part of a dog’s diet, but there may be situations in which your dog may need a low-protein dog...

Why Do Dogs Chase Shadows? Vet-Reviewed Instinct & Behavior Explanation

Dogs are full of quirky antics and questionable behaviors, so much so that you could spend hours scrolling and laughing at videos shared...

Keep reading

Can Dogs Eat Butter? Vet-Approved Nutrition Advice

It isn’t uncommon to feed your dog a bite or two from your plate; our canine pals are always overjoyed to get a taste of what we’re eating! But not everything we like eating is healthy or safe for our...

Can Dogs Eat Butter

Goat’s Milk for Dogs: Vet Reviewed Benefits, Uses & More

Many people add milk to cereal or use it in a favorite cake recipe. For dog owners, a splash of cow’s milk is a common treat for their canine companions. However, cow’s milk has its downsides, as it can cause...

farmer pours goat's milk into can

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

Can You Return Dog Food to Walmart? What You Need to Know

Have you ever adopted a new puppy and tried several different puppy foods to find something he loves, but he’s just not into anything you’re offering him? Or has your older dog suddenly developed an aversion to the food he’s...

woman buying dog food

Can Dogs Eat Rye Bread? Vet-Verified Nutrition Facts & FAQ

Sharing food comes naturally to us. It doesn’t matter if it’s our family or a friend; it’s a bonding experience. Therefore, it’s not a stretch if the things we want to give our dog extends to many tasty morsels we...

Can Dogs Eat Rye Bread

10 Best Vet-Recommended Puppy Foods in 2026 – Reviews & Top Picks

We spend a lot of time thinking about feeding ourselves and our families, and it’s easy—find a recipe, order takeout, or sign up for home delivery, and mostly, eat what tastes good! But how do you pick an all-important food...

Cocker Spaniel puppy eating

What Is Powdered Cellulose in Dog Food? Vet-Approved Safety Facts & FAQ

Choosing the best food for our furry companions is no easy task. With more options and specialized diets available than ever, pet parents are often left in the dark about what goes into their pet’s food. Cellulose is a fiber...

Powdered cellulose in a wooden bowl

Are Dog Food Bags Recyclable? List of Brands With Sustainable Programs

One of the best ways to be kinder to the environment is to use eco-friendly and sustainable pet products. A great way for dog owners to shop consciously is to purchase dog food brands that use recyclable packaging. Unfortunately, not...

woman buying dog food