A fishy smell in your dog's breath can be caused by anal gland issues, poor oral hygiene, or underlying health conditions.
Dental disease is one of the most common reasons for persistent bad breath in dogs.
Diet and digestion also play a significant role, especially if fish-based foods or supplements are used.
Regular brushing, proper diet, and vet checkups are essential to keep your dog’s breath fresh.
Always consult a vet if the smell persists despite good hygiene.
Have you ever asked yourself, “Why does my dog’s breath smell like fish?” You’re not alone. Many pet owners are surprised when their dog's breath develops a strong, fishy odour. This unpleasant smell is often linked to a range of causes: from minor issues like dietary choices to more serious concerns such as anal gland infections or dental disease.
In this blog, we’ll uncover the most common reasons your dog’s breath might smell like fish and how you can treat and prevent it naturally.
Anal gland problems are a prevalent cause of fishy breath in dogs. These tiny sacs, located on either side of the rectum, secrete a distinctive fluid used for scent marking. When functioning normally, they empty during defecation. However, issues arise when these glands become impacted or infected.
Impaction and Infection:
Impaction occurs when the anal glands fail to empty correctly, leading to a buildup of secretion. This can cause discomfort, prompting dogs to lick the area excessively, thereby transferring the odour to their mouths.
If impaction is not addressed, it can progress to an infection characterised by swelling, pain, and sometimes abscess formation. The infected material emits a strong, fishy odour.
Contributing Factors:
Dietary Influences: Low-fiber diets can result in softer stools, which may not exert enough pressure to express the anal glands naturally. Incorporating adequate fibre can promote firmer stools, aiding in natural gland expression.
Breed Predisposition: Certain breeds, such as small or overweight dogs, are more susceptible to anal gland issues due to anatomical factors.
Preventive Measures:
Regular Veterinary Check-ups: Routine vet visits can help monitor and manage anal gland health, preventing impaction and infection.
Dietary Adjustments: Ensuring a balanced diet rich in fibre can promote healthy bowel movements, aiding in the natural expression of anal glands.
Weight Management: Maintaining an optimal weight reduces the risk of anal gland problems, as obesity can exacerbate these issues.
Oral health plays a significant role in a dog's overall well-being. Dental diseases cause discomfort and can lead to systemic health issues.
Progression of Dental Issues:
Plaque and Tartar Buildup: Accumulation of food particles and bacteria forms plaque, which can harden into tartar if not removed. This creates an environment conducive to bacterial growth, leading to bad breath.
Gingivitis: Inflammation of the gums caused by plaque buildup results in redness, swelling, and bleeding. If untreated, it can progress to more severe periodontal disease.
Periodontal Disease: Advanced gum disease affects the structures supporting the teeth, leading to tooth loss and potential systemic infections.
Preventive Measures:
Daily Oral Hygiene: Brushing your dog's teeth with canine-specific toothpaste helps prevent plaque accumulation.
Dental Chews and Toys: Providing appropriate chews can aid in mechanically reducing plaque and tartar buildup.
Professional Dental Cleanings: Regular veterinary dental cleanings are essential for maintaining oral health and addressing issues before they escalate.
A dog's diet significantly influences their breath odour. Certain foods and eating behaviours can contribute to unpleasant smells.
Fish-Based Diets and Supplements:
Fish-Based Diets: While rich in omega-3 fatty acids beneficial for skin and coat health, fish-based diets can impart a fishy odour to a dog's breath .
Fish Oil Supplements: Supplementation can lead to a temporary fishy smell, especially if the oil is of low quality or has oxidised.
Coprophagia (Feces Consumption):
Behavioural Aspect: Some dogs develop a habit of consuming faeces, leading to foul-smelling breath. This behaviour can stem from nutritional deficiencies, boredom, or anxiety.
Preventive Measures:
Dietary Evaluation: Assessing and adjusting your dog's diet can help eliminate sources contributing to bad breath.
Behavioural Training: Addressing coprophagia through training and environmental management is crucial. Ensuring a clean living area and providing mental stimulation can deter this behaviour.
Quality Supplements: If using fish oil supplements, opt for high-quality products and consult with a veterinarian for appropriate dosing.
Persistent fishy breath can be indicative of systemic health issues that require prompt attention.
Kidney Disease:
Toxin Accumulation: Impaired kidney function leads to the buildup of waste products in the bloodstream, which can manifest as a fishy or ammonia-like odor in the breath.
Additional Symptoms: Increased thirst and urination, lethargy, and weight loss are common signs of kidney disease.
Diabetes Mellitus:
Ketosis: Uncontrolled diabetes can result in the production of ketones, leading to a distinctive sweet or fruity breath odour, sometimes mistaken for a fishy smell.
Additional Symptoms: Increased appetite, frequent urination, and unexplained weight loss may accompany the breath odour.
Respiratory Infections:
Bacterial Overgrowth: Infections in the respiratory tract can cause inflammation and the production of malodorous secretions, contributing to bad breath.
Additional Symptoms: Coughing, nasal discharge, and difficulty breathing are indicative of respiratory issues.
Preventive Measures:
Regular Health Screenings: Routine veterinary visits facilitate early detection and management of systemic health issues.
Monitoring for Symptoms: Being vigilant about changes in your dog's behaviour, appetite, and elimination habits can aid in the early identification of health problems.
While occasional bad breath is normal , persistent fishy breath requires medical attention .
Seek veterinary care if you notice:
✔ Consistently bad breath despite good dental care.
✔ Scooting, excessive licking, or anal gland swelling.
✔ Signs of illness (vomiting, diarrhoea, weight loss).
✔ Difficulty eating or inflamed gums.
A veterinarian can perform a thorough exam, express anal glands, and diagnose underlying health issues.
Feed a fibre-rich diet to promote natural gland expression.
Watch for signs of kidney disease, diabetes, or infections.
If you’ve ever wondered, "Why does my dog's breath smell like fish?", the answer is often related to anal gland issues, dental disease, diet, or underlying health concerns.
By maintaining good oral hygiene, monitoring dietary habits, and addressing potential health issues, you can help eliminate bad breath and keep your dog healthy.
If your dog's breath smells fishy for an extended period, consult a veterinarian to ensure there are no serious underlying conditions.
Concerned about your dog’s fishy breath? Try these solutions today and visit your veterinarian for a thorough check-up.
While we strive to provide accurate and up-to-date information, this blog is for informational purposes only and is not intended as a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a licensed veterinarian for personalised guidance regarding your pet's health. We are not responsible for any decisions or actions taken based on the information provided in this blog.
If your dog’s breath still smells like fish despite regular brushing, the issue may be anal gland problems, digestive issues, or an underlying health condition like kidney disease. A vet visit can help diagnose and resolve the root cause.
Yes. A diet high in fish-based proteins or fish oil supplements can temporarily cause a fishy odour in your dog’s breath. Additionally, low-quality dog food or poor digestion can contribute to bad breath.
You can freshen your dog’s breath by brushing their teeth daily, providing dental chews, adding fresh parsley or coconut oil to their diet, and ensuring proper anal gland health. If the issue persists, consult a vet.
Yes. Chronic bad breath, especially if it smells fishy or rotten, can indicate dental disease, kidney disease, diabetes, or respiratory infections. If the smell persists, a veterinary checkup is recommended.
It’s best to brush your dog’s teeth daily and schedule professional cleanings once a year. Regular dental care prevents plaque buildup, gum disease, and bad breath.
Yes. Small dog breeds (Chihuahuas, Yorkies, Pugs) and brachycephalic breeds (Bulldogs, Boxers) are more prone to dental issues, leading to persistent bad breath. Regular oral care is especially important for these breeds.
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Minnie dried soft and not sticky, good lather, quick rinse.
Mabel drinks as normal and morning whiffs have eased a lot no toothbrush wrestling.
Our girl zones out with yoghurt while I plate up ten minutes of peace!
Lives on Murphy’s lead so we always have a water stop on hot days
My Beagle settled nicely during a food switch. The little scoop helps.
