Pet Health

Why Does My Dog Smell Like Fish?

Discover common reasons why your dog might smell like fish, including diet, skin issues, and hygiene tips. Keep your furry friend smelling fresh and healthy!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Close-up of a dog with a concerned expression, exploring its fur, highlighting skin issues that cause fishy odor.

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Has your dog been giving off a fishy smell lately? It’s a common issue that puzzles many pet parents. While the odor may be unpleasant, it’s often a sign that something is going on with your dog’s health. The good news is that most causes are treatable with proper care. Let’s dive into why your dog might smell like fish and what you can do about it.

⚠️ What to Watch For

A fishy smell in dogs can vary in intensity and may be more noticeable in certain situations. Pay attention to when and where the odor occurs, as this can help pinpoint the underlying issue. Here are some signs to look for:

  • The smell is strongest around the rear end.
  • Your dog is scooting or licking their anus excessively.
  • There’s redness, swelling, or discharge near their anal area.
  • The odor is noticeable after your dog has been licking themselves.
  • Your dog’s breath smells fishy, especially after eating.

If you notice any of these symptoms, it’s time to investigate further or consult your vet for guidance.

🔍 Possible Causes

There are several potential reasons why your dog may smell like fish. Some are minor and easy to address, while others require veterinary attention. Here are the most common culprits:

1. Anal Gland Issues

The most frequent cause of a fishy smell in dogs is problems with their anal glands. Dogs have two small sacs located near their anus that release a smelly fluid. This fluid helps dogs mark their territory, but when the glands become impacted or infected, the odor can become overwhelming.

2. Dental Problems

Bad breath with a fishy odor could indicate dental disease. Plaque buildup, gum infections, or abscessed teeth can all cause unpleasant smells. If your dog’s mouth is the source of the odor, it’s important to address their oral health.

3. Diet

Certain foods, especially those rich in fish-based ingredients, can cause a lingering fishy smell. If your dog recently had fish-based treats or food, the smell might be temporary and harmless.

4. Urinary Tract Infections (UTIs)

A fishy smell from your dog’s urine could signal a urinary tract infection. UTIs can also cause your dog to urinate more frequently, strain to urinate, or have accidents in the house.

5. Skin Infections

Bacterial or yeast infections on your dog’s skin can produce a strong, fishy odor. Look for signs like redness, itchiness, or greasy fur, which may indicate a skin issue.

6. Vaginal Discharge

In female dogs, a fishy smell might be linked to an infection or abnormal discharge from the vagina, such as pyometra (a potentially life-threatening uterine infection).

✅ What You Can Do at Home

For minor cases, there are steps you can take to reduce the smell and keep your dog comfortable. Here’s what you can try:

  • **Clean the anal area:** Use a pet-safe wipe to gently clean your dog’s rear if the smell seems to come from their anal glands.
  • **Check their diet:** If the odor is linked to fish-based food, consider switching to a different protein source.
  • **Brush their teeth:** Regular dental care can help eliminate bad breath and prevent oral health issues. Use a dog-safe toothbrush and toothpaste.
  • **Bathe your dog:** A thorough bath with a dog-safe shampoo can help remove odors caused by skin issues.

Remember, these tips are only for mild cases. If the smell persists or your dog shows other symptoms, consult your vet for professional advice.

💡 When to Call a Vet

While some causes of fishy smells are harmless, others may require veterinary attention. Contact your vet if:

  • The odor doesn’t improve after cleaning or bathing.
  • Your dog is scooting, licking excessively, or seems uncomfortable.
  • There’s swelling, redness, or discharge near the anal area.
  • Your dog has other symptoms, like vomiting, lethargy, or changes in appetite.
  • You suspect a urinary tract infection or other internal issue.

Prompt treatment can prevent complications and keep your dog feeling their best. If you’re unsure, don’t hesitate to reach out to a vet for guidance.

FAQs

Q: How do I know if my dog’s anal glands need to be expressed?
A: Signs include scooting, licking their rear excessively, or a strong fishy odor. If you notice these symptoms, your vet can assess whether the glands need to be expressed.

Q: Can I express my dog’s anal glands at home?
A: It’s possible but should only be done if you’ve been trained by a vet. Improper technique can cause pain or injury. It’s safer to leave this to a professional.

Q: What should I do if the fishy smell comes back after a bath?
A: Persistent odors often indicate an underlying issue, such as anal gland problems or infections. Schedule a vet visit to identify and treat the cause.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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