Why Does My Dog Smell of Fish? Expert shares causes - and how to deal with them
Here are the causes of the stinky problem - and, importantly, how to deal with it.
It’s an issue that many dog owners never expect to encounter but is surprisingly common - a pet dog smelling unpleasantly fishy.
But it’s probably not an issue with there being fish in their food - or that they’ve been enjoying rolling in something disgusting (or delicious in their opinion).
Instead it’s likely to be one of two health issues that need attention.
To help out the experts at the fresh dog food brand Years.com explain everything you need to know.
It’s not fish, it’s the rear (or the mouth)
There are two common sources of the smell.
Anal glands not emptying properly
Loose stools can prevent the anal glands from naturally expressing, leading to a build-up of fluid and that classic fishy smell.
Dysbiosis of the oral microbiome
Oral microbiome imbalances and plaque can also produce a fishy odour from the ‘head end’. Brushing your dog’s teeth and using supplements can help restore balance.
Diet is key
Soft stools are often linked to diet, intolerances, and stress. Experts recommend:
- Ensuring fibre-rich food for firm, smooth stools (score 2–3 on the canine stool chart)
- Using soluble fibre sources like chicory root, psyllium husk, or gum arabic
- Avoiding rich leftovers or foods your dog may be intolerant to
Whole foods help, but fibre supplements are often more effective. Combining a high-quality diet with supplements gives both soluble and insoluble fibre for optimal gut health.
A simple festive recipe
For dogs prone to fishy odours, try this gentle, high-fibre option:
- Base: High-quality dog food
- Add: Small amounts of soluble fibre, like pumpkin or psyllium husk
- Mix-ins: Dog-safe festive veggies like carrots or green beans
This supports firm stools, healthy digestion, and reduces anal gland odours safely and tastily.
Practical tips for owners
Here’s what you can do to avoid the unwanted fishy odours.
- Monitor stool consistency daily
- Avoid rich leftovers or foods your dog may be intolerant to
- Maintain dental hygiene
- Seek veterinary advice if odour persists, as it may indicate underlying issues
With the right diet, hygiene, and attention, you can solve the mystery of fishy-smelling dogs. It’s not just about smelling fresher, it’s about keeping your dog healthy.
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