If your dog smells like fish and you know it is not their dinner, the culprit is almost certainly their anal glands. That unmistakable odor is one of the most common complaints pet parents bring to the vet, and the good news is it is fixable. This guide covers exactly how to eliminate the smell from your dog, your home, and your life, and more importantly, how to keep it from coming back.
What Causes the Fishy Smell?
Dogs have two small sacs called anal glands located on either side of the anus at roughly the 4 o'clock and 8 o'clock positions. These glands produce an oily, pungent fluid that dogs use for scent marking, which is why dogs sniff each other's rear ends when they meet.
In a healthy dog, this fluid is released in small amounts during every bowel movement. You would rarely notice it. The smell becomes a problem when the glands are not emptying properly. When the fluid builds up, it thickens, becomes more concentrated, and eventually leaks onto your dog's fur, their bedding, your couch, or your carpet. That is the fishy smell.
There are a few reasons the glands might not be emptying on their own:
- Soft or loose stool — firm stool creates the pressure needed to squeeze the sacs during bowel movements; soft stool does not
- Excess weight — pushes the glands deeper and reduces the muscle tone needed for natural expression
- Allergies — food or environmental allergies cause perianal inflammation that can block the gland ducts
- Anatomical factors — some dogs, especially small breeds, have glands positioned in a way that makes natural emptying difficult
For a deeper look at the full range of anal gland conditions, see our comprehensive guide to anal gland issues in dogs.
How to Clean the Smell Off Your Dog
If the smell has already happened, here is how to deal with it immediately.
Step 1: Wipe the source
Start by cleaning the perianal area directly. Glandex Wipes are formulated with enzymatic deodorizers that break down the compounds in anal gland fluid rather than just masking the odor. Gently wipe the area around the anus, the tail base, and any fur where fluid may have spread. This is also good practice after any at-home or veterinary anal gland expression.
Step 2: Targeted bath
If the smell has spread beyond the immediate area, a bath is the next step. Use a mild, dog-safe deodorizing shampoo and focus on the rear end, tail base, inner thighs, and any areas the dog may have been sitting or scooting on. Rinse thoroughly. Regular soap alone often does not fully break down the oily gland secretion, which is why an enzymatic or deodorizing formula works better.
Step 3: Dry and reassess
After drying your dog, give them a sniff check. If the odor lingers in a specific spot, apply another wipe to that area. Persistent smell concentrated around the anus after cleaning could indicate the glands are still leaking, which means the underlying issue has not been resolved yet.
How to Remove Anal Gland Smell From Your Home
Anal gland fluid is oily and potent. If it gets on carpet, furniture, or fabric, a standard cleaning will not always do the job. Here is what works:
Carpet and upholstery
- Blot first — do not rub. Use paper towels to absorb as much of the fluid as possible before it sets
- Apply an enzymatic pet odor cleaner — enzymatic cleaners contain bacteria that break down the organic compounds causing the smell. Spray generously and let it sit for the full recommended time
- Avoid ammonia-based products — ammonia can chemically set the odor rather than remove it
- For stubborn smells — after the area has dried from the enzymatic treatment, sprinkle baking soda over it, let it sit for a few hours, and vacuum
Dog bedding and washable fabrics
- Machine wash on the hottest setting the fabric allows
- Add an enzymatic laundry booster or half a cup of white vinegar to the wash cycle
- Air dry and check for residual odor before putting bedding back in use
Hard surfaces
Tile, hardwood, and other hard surfaces are easier. Wipe with an enzymatic cleaner or a solution of equal parts white vinegar and water, then dry.
When the Smell Means a Vet Visit
A mild, occasional whiff after a bowel movement is not unusual. But certain patterns mean it is time to see the vet rather than just cleaning up:
- The smell is constant or getting worse — glands that leak continuously are likely impacted or infected
- You see discharge, blood, or pus — this signals infection or a possible abscess that requires treatment
- Your dog is scooting — dragging their rear on the floor to relieve pressure
- The area around the anus is swollen, red, or hot — inflammation or abscess
- Your dog is licking or biting their rear excessively — a pain response
- You have been expressing the glands frequently but the smell keeps returning — the underlying cause needs to be addressed
If you are unsure whether your dog's glands need professional attention or if you can manage at home, our guide on when to see a vet vs. groomer vs. expressing at home breaks down the decision.
How to Prevent the Smell From Coming Back
Cleaning up the odor is step one. Preventing it is the real goal. Since the smell comes from glands that are not emptying naturally, the fix is supporting the conditions that allow them to empty on their own.
Support firm stool with fiber
This is the single most important factor. Firm stool physically presses on the anal sacs during every bowel movement, squeezing out the fluid before it has a chance to build up and produce odor. Glandex Soft Chews are formulated with a patented blend of soluble and insoluble fiber, plus prebiotics and probiotics, specifically designed to promote the firm, bulky stool that supports natural anal gland function. For more dietary strategies, see 7 foods that help dogs express their anal glands.
Maintain a healthy weight
Overweight dogs are more prone to anal gland issues because excess tissue around the glands makes natural emptying harder. Regular exercise and appropriate portions help keep the glands functioning properly.
Address food and environmental allergies
Allergies are one of the most overlooked causes of chronic anal gland problems. Both food sensitivities and environmental allergies can cause inflammation around the gland ducts, preventing them from draining. If your dog has recurring anal gland smell along with itchy skin, ear infections, or paw licking, talk to your vet about allergy testing or an elimination diet.
Keep up with perianal hygiene
Even when the glands are functioning well, a quick wipe of the perianal area after baths or when you notice mild odor can prevent buildup. Glandex Wipes are designed for exactly this, using enzymatic deodorizers that neutralize odor rather than covering it up.
Monitor stool consistency
Your dog's stool is the best ongoing indicator of anal gland health. Consistently soft, loose, or small stools mean the glands are not getting the pressure they need. If you notice a change in stool quality, address it with your vet before the gland problems and smell follow.
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