Can Dogs Eat Canned Mackerel

The Short Answer: Yes — With Important Distinctions Between Mackerel Species

Canned mackerel can be safe and nutritious for dogs, but there is an important distinction between mackerel species. Atlantic mackerel and Pacific mackerel are small, short-lived fish with low mercury levels — safe for regular feeding. King mackerel (also called kingfish) is a large, long-lived predatory fish with very high mercury levels — not safe for dogs. Always check which species of mackerel you are buying. Choose water-packed, no-salt-added varieties of Atlantic or Pacific mackerel.

Benefits of Safe Mackerel Varieties for Dogs

1. Rich in Omega-3 Fatty Acids

Atlantic and Pacific mackerel are among the richest natural sources of EPA and DHA omega-3 fatty acids, supporting skin and coat health, joint health, brain function, and cardiovascular health in dogs.

2. High-Quality Protein

Mackerel provides all essential amino acids in a highly digestible form, supporting muscle maintenance, immune function, and overall health.

3. Vitamin D and B12

Mackerel is an excellent source of vitamin D and B12, supporting bone health, immune function, energy metabolism, and nervous system health.

4. Selenium

Mackerel provides significant selenium, an antioxidant mineral that supports immune function and thyroid health.

The Critical Distinction — Mackerel Species and Mercury

Most canned mackerel sold in supermarkets is Atlantic or Pacific mackerel — check the label to confirm the species.

What to Watch Out For

1. Added Salt

Many canned mackerel products contain added salt. Always choose no-salt-added varieties for dogs.

2. Mackerel in Oil or Sauce

Mackerel packed in oil adds fat. Mackerel in tomato sauce or other sauces may contain garlic or onion. Always choose plain water-packed mackerel for dogs.

3. King Mackerel — Never Safe

King mackerel has one of the highest mercury levels of any commercially available fish. Never give your dog king mackerel in any form.

How to Safely Give Canned Mackerel to Dogs

• Choose Atlantic or Pacific mackerel — confirm the species on the label
• Packed in water — not oil or sauce
• No added salt — check the label
• Drain thoroughly before serving
• Small dogs — 1–2 tablespoons, 2–3 times per week
• Large dogs — 3–4 tablespoons, 2–3 times per week

Safe Fish Treat Alternatives

👉 Natural Balance Limited Ingredient Rewards Crunchy Biscuits with Real Salmon — dog-specific fish treats formulated for canine health. A great complement to mackerel in a fish-based treat rotation.

👉 Pet Oil Omega 3, 6, 9 for Dogs — provides concentrated omega-3 fatty acid benefits in a daily supplement. A convenient way to deliver fish-derived nutrition without the sodium concerns of canned fish.

The Bottom Line

Canned Atlantic or Pacific mackerel in water with no added salt is safe and nutritious for dogs — rich in omega-3 fatty acids, vitamin D, and B12. The key is choosing the right species: Atlantic and Pacific mackerel are safe for regular feeding, while king mackerel should be avoided entirely due to very high mercury levels. Always check the label for species, salt content, and packing liquid.