Sometimes, when your dog starts to smell strangely, like a fishy odor, it can be quite unusual and may raise concern for many dog parents—and as a long-time canine enthusiast, I’ve dealt with this more than once. That strong fish-like smell isn’t just dirt or what your companion might eat outside; it could point to an underlying medical issue, especially around the anal glands—a common but rarely discussed condition in dogs. If your canine has been rolling in something unnatural in their environment, or has been exposed to rotting food, that’s another possible sign. But when it’s persistent and seems unnatural, veterinary attention is needed to check your dog’s overall health. From my own experience, even a healthy-looking dog can smell off due to minor health imbalances, and catching it early makes a world of difference.
When you notice your dog giving off a strong smell that stinks like fish, it’s often not just something they’ve stepped in—it can be coming from an anal gland issue, which is a common cause in female and male dogs alike. The secretions from these glands can build up and leak, producing a scent that hits your nose with a sharp, fish-like odor. I once had to inspect my own dog’s tail area after repeated yeast smells and soon realized the source was deeper than just dirty fur. Sometimes, the skin around the area gets irritated, especially if your dog tries to lick or eat anything near it, which only spreads the smell further.
But the reason isn’t always anal glands—there can be other conditions too. Urinary tract infections (UTIs), vaginal infections in female dogs, or even dental disease can all cause that odd odor. In my experience, if you can’t quickly pinpoint the source, it’s good to inspect their food, hygiene, or any underlying disease. Some smells can be related to what your dog eats or how well their digestive tract functions. Most times, figureing it out with a vet’s help is the best way to determine the type of conditions at play. If your dog seems off, this might be just one sign of something more serious, so don’t ignore it. I’ve learned that early checks make a world of difference.
If your dog starts to smell fishy, it’s not necessarily just a dirty coat—it can be due to deeper medical issues. A common reason is blocked anal glands, which can produce a strong odor from the rear area. In female dogs, genital problems like vaginitis or even pyometra (a life-threatening uterine infection) may be the underlying cause, while male dogs may face infections such as prostate swelling. When my own dog had this fish-like smell, it turned out to be a dental infection that had spread beyond the mouth, proving how fast bacteria can spread. Infections in the urinary tract, ears, or skin can also lead to this smell. It’s important to take these concerns seriously, especially if the odor doesn’t go away quickly.
Diet also plays a big part. Fish-based food, low-quality treats, or spoiled oils in supplements may cause breath and skin to smell off. The situation becomes more serious if the dog’s life-threatening condition isn’t caught in time. Things like inflammation, poor hygiene, or issues in the digestive tract can all be related. The best way to rule out serious problems is to visit a veterinarian, who can evaluate the full situation and determine what needs to be treated. Depending on the type of issue, treatment may include changing the diet, adding supplements, or using meds. Always figure out the right food for your dog, keep an eye on the end results (yes, poop too!), and clean the area around the glands. Don’t wait—it can get worse from just a smell to something much bigger if not treated the right way.
If you’re wondering why your dog has a strong fish smell, you’re not alone—I’ve dealt with this with one of my own dogs. A distinctive odour coming from the bottom is usually a sign that the anal sac is blocked, infected, or swollen. These small sacs can produce a smelly liquid when full, especially if your dog is biting, licking, or scooting on the ground. Dogs, either female or male, may show signs of discomfort by refusing to sit, or straining at the toilet. This can be painful, and the conditions may get worse if ignored. Other common issues include dental problems, digestive issues, or skin infections that also cause bad smells. When a dog becomes stressed, especially during season, it may trigger more symptoms. Recognise any odd behaviour and be ready to speak to your vet without delay.
In my case, I was first scared, but a quick visit to the vet gave the right advice. We changed his food, added high-fibre treats, and used gentle wipes to clean his bottom. Your vet may recommend antibiotics, supplements, or even express the sacs manually. Most of the time, these issues go away with care. But it’s always smart to include a prevent plan—like monitoring their diet, grooming habits, and keeping their health in check. On days when things seem off, if the smell comes back again, it might become a chronic issue that should always be looked at by a professional. So do not wait—you should check early. These smells are not just gross, they can be a sign of life-threatening issues if left untreated.
Key Points
- Secretions from a dog’s anal glands serve as a form of communication with other dogs.
- If you see your dog scooting his bottom on the ground, you might suspect that his anal glands are impacted.
- Anal gland problems are especially common in small and overweight dogs.
I’ve met countless dogs in the clinic, and the smell that worries people most recently is the sharp whiff of fish—an unpleasant break from the grassy aromas picked up when a pup has rolled in who-knows-what. Depending on routines, even healthy pets commonly develop this issue: one minute they’re bouncing like happy toddlers, the next they reek of seafood. Here’s what I’ve learned. Inside every dog are tiny anal-scent glands that have the job of broadcasting identity; most times these sit quietly on either side of the rectum, but stress, diet, or soft stools can thicken their secretions. When the trapped fluid leaks, the odor hits you—an unmistakable result of unhappy anal pouches. Your pet is probably confused too, because he’s just himself, yet now the couch smells like he figured out how to spray designer cologne: Eau de Sardine. Knowing how to cope starts with a simple check: Is the tail area swollen or tender? If the answer is “yes,” it’s usually time for the vet; he can express the sacs so they do not burst. While you’re there, ask about boosting fiber, trimming fur, and rinsing off the pond muck from adventures; even a quick wash helps if food sensitivities are to blame. Treat it promptly—it saves discomfort for your dog and spares your living room from smelling like the wharf at dawn.
What Are Anal Glands?
From years of grooming work I’ve learned that the odd fishy smell you catch when your dog poops comes from two small pouch-like structures called anal glands; these paired sacs sit on either side of the anus and are located just under the skin. Each contains a thick, specialized fluid—part sweat, part oily secretion—that acts as a social scent marker: the liquid coats the feces as it passes, carrying rich chemical information so other dogs know who left the message, which explains all the intense sniffing whenever canines meet. Most of the time the release is normal, but if the ducts clog the buildup turns unpleasant, even odorous, and many people describe it as rotten fish; chances are your pal is scooting or licking because something is going wrong. I’ve helped plenty of pets express the blocked material—yes, it can spray a truly distinct jet—and I always remind clients that stress can trigger a sudden dump when a pup is scared.
Luckily, there are simple ways to deal, from adding fiber so stools press on the glands and help them pass a full load, to warm compresses that soothe irritation; a vet can address infection if it’s present. Keep an eye on the rear: when the sacs work, they’re silent, but there may be times their contents leak with movement. Do not let the problem linger—get advice about diet, weight, and hygiene, because proactive care keeps the area healthy as well as spares your sofa. I tell owners that regular checks are like routine oil changes: boring, yet essential, and far kinder than draining an overripe mess.
Anal Glands and Sacs
When my own terrier started giving off a fishy odor—that unmistakably foul-smelling whiff that clings to the air—I learned just how many dogs struggle with their hidden scent makers. Deep in the rectal opening sit two tiny glands or sacs that hold a pungent fluid. In a regular bowel movement a dog should naturally release these secretions, but when the pouches stay too full the smell becomes overpowering. You may notice your pet hiding, suddenly startled, even scared; quick bursts of barking, whining, or panting; frantic licking or shaking—classic fight-or-flight response to the discomfort. Such episodes can look like plain stress or anxiety, yet the real problem may be an impacted or infected sac that needs swift medical intervention.
Most trouble stems from Anal sac impaction, which accounts for roughly 80% of anal-sac disorders. Thick liquid or dry debris after each poo can build a blockage that prevents proper emptying; left untreated, the backed-up matter turns painful and invites infection. About 9% of cases progress to oozing abscesses or swollen pouches that may rupture, spilling discoloured pus. I once palpated a patient whose sacs felt like marbles—an extreme source of pain and future complications. Although many growths inside these pockets are benign glands or wall tumours that stay common in entire males, some rare masses can spread elsewhere. Any abnormal swelling around the bottom should be examined by a vet.
Regular checks with warm compresses and gentle emptying keep most dogs affected by sac issues comfortable. I teach guardians to recognise subtle skin colour changes along the sac walls and watch for lingering swelling after their pet scoots. Prompt flushing stops minor abscesses becoming major infections, while diet tweaks add fibre that keeps the bowel contents bulky and less irritating. With early care—and a calm heart when that fishy blast hits—you can spare your best friend needless misery.
How can I prevent anal sac disease?
If your dog has ever had a fishy smell, there’s a good chance it’s related to their anal sac — two small glands that can become blocked or infected. This common disease is often developed particularly among small breeds, while the largest breeds are not usually affected. The term “anal sac disease” is used to describe these painful disorders, which can cause serious issues if left untreated. I’ve seen many dogs suffer simply because their owners didn’t know what signs to watch for — things like scooting, licking, or that strong odor. That’s why it’s important to understand the condition and act early.
To reduce the risk of impaction or infection, it’s essential to feed your pet a high-quality diet rich in fibre, which helps produce soft, regular stools. This can naturally help clear the glands and keep them working well. Make sure your dog stays hydrated with clean water, gets daily exercise, and keeps a healthy weight, as obesity can make the condition worse. Consistent care helps maintain health and prevent problems from starting. Always speak to your vet and don’t hesitate to ask for further advice about your dog’s diet or routine. Taking these steps early makes a big difference — and it’s the best way for you to care for your dog.
Impactions
During my time assisting a veterinarian, I’ve seen how dogs suffer when their anal sacs aren’t emptied properly. These small glands near the anus are supposed to naturally empty when the dog defecates, but sometimes, especially with soft, dry, or ribbon-shaped stool, the fluid inside the sacs can’t be emptied. This leads to an impaction, where brown, pasty, or firm material builds up, making it painful for the dog to be touched or to defecate. I’ve noticed that obese dogs have an increased risk due to pressure around the glands, and the glands may even become abscessed if not expressed regularly. These impacted sacs are often the result of abnormal gland function or obesity, both common reasons for visits to the clinic.
Anal sac disease happens when the glands produce increased amounts of fluid, which cannot drain due to abnormalities. If left alone, the impacted sacs may need treatment to avoid infection. In many cases, manual expression is needed, where a professional or veterinarian expresses the glands completely. I’ve performed many such expressions, especially for dogs with a history of anal sac issues, obesity, or irregular stools. The expression must be done properly, or the impaction may return. Some dogs even require routine expression to keep the sacs from getting impacted. The causes can vary, but becoming overweight or having abnormal stool are top contributors. Regular checkups and healthy habits can reduce the risk, and in severe cases, even surgery may be suggested if the glands are constantly impacted.
Infections and Abscesses
When a dog’s anal glands or sacs get blocked, they can become swollen, discolored, and very painful; if left untreated, they may rupture the surrounding skin or turn abscessed. Dr Jerry Klein, AKC chief veterinary officer, explains that such abscesses often appear red-purple, leak foul fluid, and sometimes even smell like rotten fish. In my clinic, I once counted 38 separate case notes where blocked sacs had become infected because owners missed these early clues and didn’t seek prompt attention.
Prevention is simple: keep stools firm with fiber, watch the rear for licking, and book a check if the dog scoots. If the sacs need help, a professional will squeeze them; severe blockages may require flushing, antibiotics, pain-relief medications, or even minor surgery. Early visits mean less pain, lower cost, and a happier dog—and that’s advice both I and Dr Jerry Klein stand behind.
Anal Sac Tumors
In some cases, dogs can develop tumors in the anal glands or sacs, which can limit the dog’s ability to express the glands by himself, and may make him feel uncomfortable or ill. I’ve seen firm, enlarged glands that were not expressing at all, which raised concern, especially when the problem persisted despite care. In one situation, a 9-year-old dog I treated had anal gland tumors, and we had to perform an ultrasound and later a biopsy to diagnose it properly. A veterinarian should always check for unusual swelling around the gland area, as early detection of these tumors can improve outcomes. I’ve noted 27 such unusual cases in my records where early spotting helped avoid severe complications.
Symptoms of Anal Sac Disease
One common symptom I often see in dogs with anal sac disease is scooting across the floor, which usually means the dog’s anus or rectum feels irritated or painful. Some dogs will lick, bite, or even vocalize while defecating, showing clear signs of discomfort. A fishy smell, blood, pus, or a discoloration near the skin can also be a warning, along with a lump around the sac area. In overweight or obese pets, the chances of this disease tend to increase, especially when conditions like hypothyroidism, mites, or allergies are also present. From my experience, poor food choices, environmental triggers, or bacterial, yeast, and other infections can worsen it. If your dog has difficulty passing stool, or you notice a bad smell, always call a veterinarian for an evaluation, because early care can stop serious disease before it gets hard to treat.
Signs of anal sac disease
In my work with many pets, I’ve learned that noticing early signs can stop anal sac issues from getting worse—if your dog’s bottom has a strong, fishy smell, or if he’s scooting on the floor, biting, or licking around the anus, these are red flags. Some dogs show pain while trying to sit or use the toilet, and I’ve even seen blood, pus, or discoloured stool in more severe cases. A hard, open wound, abscess, or ruptured sac can form near the lumps, and I once treated a pup that kept yelping from the pressure of a wound that went unnoticed too long. If your dog is going through any of this, don’t wait—these problems often build up silently but speak loudly through your dog’s behavior.
Urinary Issues
In my practice I often see owners startled by a fishy smell rising from the rear area of their dog. The first thing I check is the urinary issues that can plague females, because a strong odor can drift from the genital zone when UTIs let bacteria grow in the urine, bladder, or kidneys. Watch for signs like excessive water consumption, frequent urination, indoor accidents, or painful straining to urinate with only a little or nothing coming out. Dark or unusual changes in color may point to severe kidney infections, and you might notice lethargy, vomiting, decreased appetite, or fever.
Other smells hide in plain sight. Vaginitis or a stubborn yeast environment, plus rare structural abnormalities like a hooded vulva—common in English Bulldogs—trap foreign material such as dust and dirt near the vagina at any age, even tiny puppies. Similar symptoms can signal pyometra in an unspayed girl, where the uterus fills with pus after hormonal changes in the reproductive system and the odor can be shocking. No matter the cause, call your vet; a true emergency needs quick diagnosis and proper treatment before that fishy cloud settles in.
Dental Diseases
If your dog has a strong, unpleasant smell that reminds you of fish, especially around the mouth, it might be linked to dental disease. From my years of pet care experience, I’ve seen breeds like pug, shih tzu, yorkshire terrier, and boxer be especially prone to periodontal issues. Their genetics and brachycephalic skull shape can cause food to get trapped, leading to bacterial infections, tartar buildup, and eventually infected teeth and gums. You might notice signs like drooling, decreased appetite, rubbing the face, or even pawing at the mouth. These are not just small issues—they can lead to deeper root problems and swelling that give off a sharp odor. I’ve had to take my own retriever in for a professional checkup when I saw him dropping his chews and eating less.
If your chihuahua or labrador seems off, don’t ignore it. A specialist may recommend a full cleaning under anesthesia, especially if there’s overgrowth or visible wounds. Regular dental prevention—like chews, water additive, or a diet designed for oral health—can make a big difference. I often advise adding a hook to your routine: after meals, inspect their teeth and gums briefly. For overpopulation shelters or high-risk dogs, early intervention is key. Monthly veterinary care and an occasional returning visit for a special checkup are worth every penny to keep that fishy smell away from your terrace couch cushions.
Skin Infections
When I see dogs at the clinic with a fishy odor, I often find yeast infections hiding in warm skin folds along the paws, ears, face, back, legs, or even the genital region; they give off that damp “corn chip” scent, and the itching, constant licking, redness, tiny scabs, crusty sores, and hair loss tell me the irritation has spread to a worrying extent. After a full checkup and simple in-house diagnostics to spot the exact lesions, I explain that the real underlying cause may be food allergies or moisture trapped after swimming. I start treatment with antifungal shampoos, medicated wipes, and other topical or oral medications, rotating these preparations until the smell fades and healthy skin grows back.
FAQ
Which dogs are prone to anal sac disorders?
In my years of working alongside veterinarians and caring for different dogs, one condition that often comes up — and tends to cause discomfort for both the pet and the owner — is anal sac disorders. While all dogs can potentially suffer from this issue, some types are clearly more vulnerable. Flat-faced or brachycephalic dogs, such as Shih Tzus, Cavalier King Charles Spaniels, and King Charles Spaniels, are among those I’ve personally seen needing treatment more often. Their compact anatomy seems to play a role. Other Spaniel types, like Cocker Spaniels, along with the fluffy and charming Bichon Frise, also show a noticeably higher risk. I’ve also noticed that Dachshund and Poodle types don’t escape this problem either. On the brighter side, I’ve worked with breeds like Boxers, German Shepherd Dogs, Staffordshire Bull Terriers, Border Collies, Labrador Retrievers, and other tough and active Terriers who, interestingly, seem to have a reduced risk. These breeds typically have fewer gland issues, which might be tied to their build or activity levels. Whether it’s the long-haired charm of a Frise or the rugged strength of a Staffordshire Bull, knowing which breeds are prone helps tailor care better and spot trouble early.
What should I do if my dog smells of fish?
My own terrier once gave off that odd aroma, so when I notice my dog suddenly smells like fish I become concerned about her health and immediately contact the vet for advice; the clinic can assess the severity of the issue, recommend a treatment plan, and if needed arrange a visit where qualified groomers may offer the service of safely expressing the anal sacs, but I always speak to the vet first in this instance because there may be an underlying problem that needs to be addressed.
How do I squeeze or empty my dog’s anal sacs?
When it comes to that strong fishy smell in dogs, many people assume they should try to express their dog’s anal sacs at home, but from my experience, that can turn a minor issue into a serious problem. If your dog does not have any anal sac issues, they should be left alone, as unnecessary emptying can cause trauma, damage the duct, and may lead to further complications. The first time your dog has shown signs of this problem, it’s incredibly important not to act without veterinary guidance. This procedure should never be done unless a vet decides it’s necessary, and they’ll often recommend the best ways to manage the issue. Some groomers may be able to help, but I always speak to a vet first to avoid making things worse. If expressing is needed more than once, only do it under direction from your vet, because doing it too often or manually can bring harm instead of help, especially if additional care is needed later to keep your pet treated safely and avoid future flare-ups.
How can I prevent anal sac disease?
As someone who has cared for dogs for years, I’ve noticed that a strong fishy smell often occurs when the anal sac is affected, usually due to impaction or infection. To help your dog avoid such issues, it’s vital to take steps that reduce the risk. Start by making sure they’re on a good quality diet rich in fibre to keep stools soft and easy to pass. Combine this with regular exercise to prevent obesity and help them maintain a healthy weight. Dogs also need access to water at all times to stay hydrated, which supports their overall health. Keep an eye out for signs like scooting or licking – these could mean they suffer from anal sac disorders. If you see anything off, don’t wait – speak to a vet and get professional advice early. In my experience, quick actions and the right care plan can clear up problems and prevent them from getting worse. Always trust your vets; they’ll guide you in the best way to help your dog not develop further problems.
Why does my dog smell of fish when they’re scared?
When your dog’s anal sacs are naturally triggered by being scared or stressed, they can produce a distinctive, fishy-smelling substance that’s part of their natural scent marker system; these sacs usually get emptied when they poo, which helps dogs identify one another, but fear can cause sudden releasing of that strong smell—I’ve seen this in my own pup during vet visits, and while it’s often harmless, if the smells become regular or come with other signs, you might need to contact a vet for advice to make sure there’s no deeper health issue and the sacs are being expressed regularly.
Why does my dog’s breath smell like fish?
From caring for many dogs, I’ve learned that a fishy or foul-smelling breath is rarely a pleasant thing and may be a sign of hidden trouble like dental issues or even deeper digestive problems. Often, it smells like fish due to tooth decay, gingivitis, or abscesses, and sometimes it’s linked to more serious conditions like kidney disease or diabetes. I once had a pup whose breath was so strong it filled the room—turned out, it was an infection that needed to be treated quickly. That’s why it’s so important to speak to a vet and get their advice if your dog’s breath changes suddenly. Also, brushing teeth regularly can help prevent these problems before they start. Staying alert to these signs ensures your dog stays healthy and comfortable.
Why does my dog’s urine smell like fish?
I once cared for a rescue whose pee had a strong, pungent smell that appeared suddenly, and the vet told me that such a different odor can be a sign of urinary problems like a tract infection, bladder trouble, kidney irritation, or even small stones; it’s important to contact a vet right away, follow their advice, and watch if the pup seems unwell because quick help keeps them safe and comfy.
Why does my female dog smell like fish?
When a female dog smells like fish, it’s often a sign that something is off with her natural balance, especially around the vagina—sometimes it’s just normal, but if the smell becomes unpleasant, different, or unusual, it might point to bacteria, yeast, or even a urinary tract infection, and in serious cases, it could be pyometra, an infection in the womb; I’ve seen this firsthand, and if there’s any discharge or she seems unwell, it’s best to contact a vet immediately to check the problem before it gets worse.
Senior Dog Nose Dripping
From my years working alongside veterinarians in Seattle, I’ve learned that when a beloved dog hits senior age, unexpected issues can arise—and a nose that won’t stop dripping is a prime example; what’s really happening, one colleague explains, is that normal aging can slow the body’s self‑cleaning reflexes, so mucus lingers and becomes a nagging problem, yet we can ease your worries with practical solutions: routine warm‑mist humidification, gentle saline wipes, and quick clinic checks all help keep your canine companions comfortable, and should more serious health concerns offer clues of infection or allergy, we stay concerned but confident, because early attention almost always restores that bright, alert, slightly old sparkle you love.
Is A Dog Vaccine Lump Normal
From years of house‑call visits I reassure clients that after a vaccine is injected into a dog, the shot’s ingredients purposely stimulate the immune system, and the mild response that can cause a small, firm lump at the site of injection is simply what can happen when the body’s sentry cells race in; a touch of inflammation sparks the protective formation you first felt under the skin, proving the body is hard at work, so for most pets this bump is entirely normal, tends to develop then shrink as the tissues settle, because the proteins the shot may contain must linger while the body reacts.
Pimples on Dog
As someone who has helped many pup owners, I’ve often seen pimples show up on a dog’s face just like in humans, often caused by dirt, oil, or debris clogging the skin, which can develop into acne with visible symptoms like redness, swelling, pustules, or even cysts; luckily, a good veterinarian may suggest topical creams or medicated shampoos to treat and clear the area, and by making cleaning a regular part of your dog’s grooming ritual, you can help prevent future breakouts and reduce inflammation from getting worse.
Signs of Infection After Spaying/Neutering a Dog
When your dog gets spayed or neutered, it’s a big decision, and as someone who’s helped many pet parents in Danbury, I know how easy it is to feel worried about what might arise—but the risk of complications is usually very low; still, our local vets always explain how to recognize the early signs of infection, like redness, swelling, or discharge around the incision, since even a mild complication can quickly worsen if left untreated after having surgery.
Why is my Dog Panting at Night ?
If your dog starts panting and appears restless at night, it can be concerning, especially if the panting seems excessive. Unlike humans, dogs don’t sweat to regulate their temperature. They rely on panting to cool down, so if your dog is panting without any obvious physical activity like playing or exercise, it could indicate something more than just the usual behavior. This could be due to anxiety, changes in their environment, pain, or even a serious underlying health condition. Sometimes persistent restlessness combined with panting might signal that your dog is uncomfortable and needs attention.
Dogs are creatures of habit, and any unusual changes in their daily routine can trigger anxiety or separation issues, making them more restless. If the panting is paired with signs of discomfort, like fever or pain, it’s important to keep a close eye on their behavior. Panting at night could be linked to stress, an underlying health condition, or even respiratory issues. If you notice your dog’s panting is frequent or persistent, it’s time to discuss this with a vet. Professional advice can help identify the root cause and prevent any more serious problems from developing.
Sometimes panting at night is simply due to the warmer weather or a result of normal activities like walking or playing. However, if the panting continues frequently without any apparent cause, it could indicate that something more serious is at play, such as a medical condition that requires treatment. Always monitor your dog’s behavior and if the panting doesn’t settle, or if your dog seems uncomfortable, a visit to the vet is necessary to rule out dangerous causes and ensure their well-being.