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

Share

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

The Crate Setup Most Dog Owners Get Wrong (And How To Fix It!)

Most people assume that if their dog hates the crate, the crate is the problem. So they try a bigger one, a different...

1,500 Beagles Rescued from Wisconsin Lab Farm – Here’s Where They’re Going

You may remember that a few weeks ago, we reported on a tense situation at Ridglan Farms, Wisconsin, a facility infamous for housing...

Dogster’s Weekly Photo Contest Winners: Window Watchers (May 11, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

Can a Relationship Work When One Person Doesn’t Like Dogs? Tips & When to Walk Away

For dog owners, a partner who doesn’t like dogs isn’t a minor quirk to overlook. Dogs aren’t a hobby you can scale back...

More related

How to Train a Guard Dog: 5 Vet-Approved Steps & Breed Selection Tips

Dogs are truly man’s best friend, and any dog owner knows what a rewarding experience it is to have a dog by your...

English Speagle Dog Breed: Info, Pictures, Care & More

At some point, designer dog breeds went from the functional (such as the Labradoodle) to the fun (the Puggle) and just plain weird...

Labrador Retriever Puppies for Sale in Alabama: 2026 Breeders List

When it comes to finding the perfect Labrador Retriever puppy, there are tons of options out there, one of which is purchasing from...

Appenzeller Sennenhund: Dog Breed Info, Pictures, Facts, & Traits

The Appenzeller Sennenhund or the Appenzeller Mountain dog is one of the four types of Swiss Sennen breeds. They are herding dogs with...

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

How Much Crude Protein Should Be in Dog Food? Vet-Verified Facts & Advice

Finding out how much crude protein should be in dog food, as it turns out, is not an easy question to answer. Let’s explore why. The amount of crude protein that should be in dog food varies. Several variables need...

man buying pet food in the store

HEB Heritage Ranch Dog Food Review 2026: Pros, Cons & FAQ

Review Summary HEB is an American supermarket that is centered in Texas. They have a few locations in Mexico, as well, but for the most part, their stores are found within Texas. Heritage Ranch is their brand of dog food....

Dogster_HEB Heritage Ranch Dog Food Review

Can Dogs Eat Slim Jims? Vet-Verified Nutrition Info & Risks

Dogs are known to love snack foods for humans, but can they indulge in a Slim Jim? The short answer is no, Slim Jims are not good for dogs. Read on to find out why this snack lacks benefits for...

Can Dogs Eat_Slim Jims

Can Dogs Eat Beans? Vet-Verified Nutrition Facts, Tips & Risks

Unlike their feline counterparts, dogs are omnivores and are adapted to derive nutrients from consuming both plant materials as well as animal tissue. So, you may wonder what plant material is safe for your pup. Are beans okay to offer?...

Can Dogs Eat_Beans

Inukshuk Dog Food Review 2026: Pros, Cons, Recalls & FAQ

Inukshuk is not a brand that most people are familiar with, but we hope to change that! Inukshuk dog food is for very active dogs. They have four recipes, which vary in the percentage of protein they offer. Therefore, you...

Dogster_Inukshuk Dog Food Review

Life’s Abundance Dog Food vs. Blue Buffalo 2026: Pros, Cons & What to Choose

There are a surprisingly high number of dog food brands out there. Plus, each brand has different recipes, which all contain different ingredients and benefits. There are a huge number of controversies out there, too. You’ll find varying opinions about...

Dogster_Dog Food Life’s Abundance VS Blue Buffalo

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

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter