Can Dogs Eat Herring?
Only fresh and plain-cooked. Herring is omega-3 gold for dogs — but pickled, matjes and rollmops are salt, vinegar and onion in a jar.
Quick facts
| Verdict | Caution |
|---|---|
| Risky amount | No safe or toxic dose is established — treat any amount as a risk. |
| Key symptoms | Excessive thirst and urination, Vomiting, Diarrhea, Lethargy or weakness, Pale gums (from onion in pickled preparations, often days later) |
| What to do | If your dog raided a jar of pickled herring, call your vet — beyond the salt, most recipes include onion, which can damage red blood cells with signs appearing days later. |
Two very different herrings
Fresh herring is the kind of fish vets are happy to see in a bowl: small, oily, low in mercury, and loaded with omega-3s — the same appeal as sardines. Cooked plain and flaked off the bones, it’s a superb occasional topper, and herring meal is a staple of commercial dog food for exactly this reason.
The herring most kitchens actually contain is another story. Pickled herring, matjes and rollmops live in a brine of salt and vinegar, and the traditional recipes — from the Polish śledź to the Scandinavian jars — nearly always include onions. That combination stacks a heavy sodium load on top of onion’s ability to damage canine red blood cells.
Why the jar is the hazard
Salt effects show up fast: intense thirst, vomiting, diarrhea. Onion damage is slower — lethargy, weakness and pale gums can appear days after the raid, when nobody connects it to the fish. That delay is why a pickled-herring theft deserves a vet call even if the dog looks fine tonight.
How to do it right
Cook fresh herring plain — no salt, no butter — flake it, check for larger bones, and serve a small portion a few times a week at most. Everything from a jar, tin of matjes or smokehouse stays on the human side of the table.
If your dog ate it
If your dog raided a jar of pickled herring, call your vet — beyond the salt, most recipes include onion, which can damage red blood cells with signs appearing days later.
In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply).
Frequently asked questions
- Is herring good for dogs?
- Fresh herring is one of the best fish choices — small, short-lived and low in mercury, and among the richest common sources of omega-3 fatty acids. Cooked plain and deboned, it's a genuinely healthy topper. Herring is also a common ingredient in commercial dog food.
- Can dogs eat pickled herring or rollmops?
- No. Pickled herring soaks in salt and vinegar brine, and matjes and rollmops recipes almost always include onion — toxic to dogs — plus spices. The jar liquid is as much of a problem as the fish.
- Can dogs eat smoked herring or kippers?
- Better not. Smoking goes hand in hand with salt curing, so kippers carry a heavy sodium load. A stolen bite is no emergency; a portion shouldn't be offered.
- What about the bones in herring?
- Herring bones are fine and soft, and in canned fish they're soft enough to be harmless. In fresh-cooked herring, flake the flesh and remove what you can, especially for small dogs.
See all meat & fish dogs can and can’t eat →