Can Dogs Eat Tuna? Caution — Occasional Only Due to Mercury
This food requires caution. Read the details carefully before feeding.
Canned tuna in water is safe for dogs in small amounts. However high mercury content means it should only be an occasional treat.
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Warning Signs & Symptoms
Regular large consumption: mercury poisoning, neurological symptoms.
Safe to Feed
plain cooked tuna in water
What to Avoid
raw tuna, tuna in oil, tuna with salt, large amounts
Preparation & Serving
Use canned tuna in water with no salt added. Drain well. Feed sparingly due to mercury content.
Potential Health Benefits
Good source of protein and omega-3 fatty acids. Supports heart and coat health in small amounts.
Safer Alternatives
- Sardines as a lower-mercury fish alternative with similar benefits
Did you know?
Tuna accumulates mercury throughout its long lifespan — a 200kg bluefin tuna can contain mercury levels 10,000 times higher than the water it swims in, which is why moderation is essential.
Portions & nutrition
- Toxic dose (per kg body weight)
- Mercury accumulation — limit to occasional feeding
- Serving (small dog)
- 1 teaspoon
- Serving (medium dog)
- 1 tablespoon
- Serving (large dog)
- 2 tablespoons
- Calories (per 100g)
- 132
- Safe frequency
- Once per week maximum
Source
What You Need to Know
Small amounts of tuna occasionally are fine. Choose tuna in water not oil. Avoid tuna in brine due to high salt. Fresh tuna should be fully cooked. Not a regular daily food due to mercury.
This food requires care — if your dog has eaten a large amount read our emergency guide
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