Can Dogs Eat Raw Salmon?

Raw salmon for dogs sits in an uncomfortable middle ground. It's not banned, but it's not straightforward either. The internet is full of conflicting advice, much of it copied directly from American pet blogs without considering that Australian salmon and Australian sourcing changes the risk profile entirely.

I'll be honest: I see far too many Australian dog owners feeding raw salmon because they've read it's "ancestrally appropriate" for dogs or because a raw feeding community recommended it. The rhetoric around raw diets appeals to people who want the best for their dogs. But raw salmon comes with real risks that deserve clarity, especially in the Australian context where our salmon is different from the salmon Americans worry about.

The Salmon Poisoning Disease Myth (That Doesn't Exist in Australia)

Let's address the elephant in the room first. Salmon poisoning disease is caused by a rickettsia called Neorickettsia helminthoeca. It affects dogs that eat raw or undercooked salmon from the Pacific Northwest of North America, where certain trematode parasites carry the bacteria. Dogs infected with this parasite develop severe symptoms: fever, vomiting, diarrhoea, lethargy, and can die if untreated.

Here's the critical bit: this disease has never been documented in Australian salmon or in any dog in Australia from eating Australian salmon. The parasite doesn't exist in our waters. American pet websites warn about salmon poisoning disease constantly, and Australian dog owners read those warnings and assume they apply locally. They don't.

That said, Australian salmon still carries risks. Just not that one.

The Real Risks with Raw Australian Salmon

Anisakiasis is the parasite we actually need to worry about in Australian saltwater fish, including salmon. The parasite is Anisakis simplex. When dogs eat raw salmon containing Anisakis larvae, the larvae can burrow into the stomach or intestinal wall, causing inflammation, vomiting, and abdominal pain. Some larvae pass through without causing problems. Others cause significant GI distress or even require surgical removal.

Freezing salmon at minus 20°C for seven days, or minus 35°C for fifteen hours, kills Anisakis larvae. This is an important detail because many raw feeding proponents claim freezing makes salmon safe. Freezing does reduce parasite risk, but freezing protocols matter. Home freezers sit at minus 18°C and take several days to reach full temperature. A salmon fillet dropped into a home freezer for 48 hours is not parasite-safe.

Thiaminase is an enzyme found in raw fish that breaks down thiamine (vitamin B1). Dogs fed raw fish regularly can develop thiamine deficiency, leading to neurological signs like incoordination, loss of appetite, and seizures. This risk increases with frequent consumption, not single servings.

Bacterial contamination is the third layer. Raw salmon can carry Salmonella and Listeria. Dogs handle Salmonella far better than humans do, and their stomach acid kills most pathogens humans would find dangerous. But bacterial load varies with the salmon's origin and handling. Supermarket salmon has been through multiple handling steps. Sushi-grade salmon from a reputable fishmonger who sources directly from suppliers has better traceability.

How to Serve Raw Salmon If You Insist

If you choose to feed raw salmon despite these risks, reduce harm as much as possible. Buy sushi-grade salmon from a reputable fishmonger who can confirm the freezing history. Ask specifically whether the salmon has been frozen to commercial standards (minus 20°C for seven days minimum). Freeze it in your own freezer for an additional week before serving.

Remove every bone. Check the flesh carefully for parasites (they appear as thin dark lines). Serve no more than once or twice monthly, and never as a staple. Consider it an occasional treat, not a diet component.

The safer approach is to cook salmon to 63°C internal temperature. Cooked salmon retains the omega-3 benefits, eliminates parasite risk entirely, and destroys thiaminase. Bruno gets cooked salmon occasionally, and he thrives on it. I've never had a reason to recommend raw salmon to any client when cooked salmon achieves the same nutritional goals without the parasites.

Frozen-Then-Thawed Salmon

Some raw feeders argue that properly frozen salmon is essentially "raw-frozen" and safer than fresh raw salmon. This is technically true. Properly frozen salmon (commercial freezing standards, minus 20°C or below) does kill most parasites. Home-frozen salmon is riskier because home freezers don't reach the required temperatures quickly enough. If you source commercially frozen salmon and keep it frozen until serving, thaw it in the refrigerator, and serve it within 24 hours of thawing, you've reduced the parasite risk significantly. You haven't eliminated bacterial or thiaminase risks, but they're lower.

The Frequency Question

Single servings of raw salmon on rare occasions are unlikely to cause thiaminase deficiency or major problems. A medium dog eating a 50-gram piece of raw salmon once every three months is taking a small risk with parasites but not a catastrophic one. A dog eating raw salmon three times weekly, as happened with my client's situation, has much higher parasite exposure and real thiaminase deficiency risk. The difference between "occasionally" and "regularly" determines whether raw salmon is sometimes acceptable or genuinely dangerous.

When to Call the Vet

If your dog has eaten raw salmon and develops vomiting, diarrhoea, or abdominal pain in the days that follow, contact your vet. If these signs develop weeks later, parasite infection or thiaminase deficiency could still be the culprit. If your dog shows neurological signs, incoordination, or loss of appetite after weeks of raw salmon feeding, thiamine deficiency needs investigating.

FAQ

Is raw salmon safer than raw chicken for dogs? Both carry bacterial risks, but raw salmon adds parasite concerns that raw chicken doesn't. Raw chicken's main risk is contaminating the dog's bowl and the human's food safety chain rather than making the dog acutely ill. Raw salmon's parasite load is the bigger direct health concern for the dog itself.

Can I feed Australian salmon raw if it's from a specific fishmonger? Source matters, but it doesn't guarantee safety. A reputable fishmonger can tell you the salmon's origin and whether it's been frozen to commercial standards. That information helps you make an informed choice, but it doesn't eliminate parasite, bacterial, or thiaminase risks. Knowing the source is better than guessing, but it's not a safety guarantee.

How do I know if my dog has anisakiasis? Acute symptoms include vomiting, diarrhoea, and abdominal pain within days of eating raw salmon. Some dogs show lethargy or loss of appetite. Others pass the larvae without symptoms. If your dog develops these signs after eating raw salmon, vomiting can sometimes expel the larvae, but severe cases may need surgery. Your vet can sometimes see the larvae on endoscopy.

Is the omega-3 benefit worth the raw salmon risk? No. Cooked salmon provides the same omega-3 fatty acids with zero parasite risk. If omega-3 supplementation is your goal, cooked salmon, fish oil supplements, or algae-based alternatives are safer choices. The "raw is ancestral" argument is emotionally appealing but nutritionally unnecessary.

Can I give my dog frozen salmon instead? Frozen salmon that's thawed and served is safer than raw salmon because freezing kills parasites if done to commercial standards. But cooked salmon is still safer because it also eliminates bacterial and thiaminase risks. If you're already buying sushi-grade frozen salmon, cooking it adds minimal effort and major safety benefits.