Can dogs eat raw fish?
In small amounts only. raw fish isn't toxic to dogs, but it isn't something to hand over freely either.
Why
Raw fish may contain parasites and bacteria. Some raw fish contains thiaminase, which destroys thiamine (vitamin B1), leading to deficiency.
What to watch for
Parasites: vomiting, diarrhea, weight loss. Thiamine deficiency: lethargy, loss of appetite, neurological problems.
What to do
Offer cooked fish instead. If raw fish was eaten, monitor for symptoms.
This page is not veterinary advice and is not a diagnosis. It's a general reference for a common food, and it can't account for your pet's size, age, health conditions, medications, or how much they actually ate. Toxicity is almost always about dose. If your pet has eaten something you're worried about — or is showing any symptoms — call your veterinarian, an emergency animal hospital, or a poison control hotline right away. Never induce vomiting unless a veterinary professional tells you to.