Can dogs eat sardines?
The full picture
Sardines are one of the best human foods you can feed a dog, but the type you buy matters enormously. The question we get asked most: "Can dogs eat sardines in spring water?" Yes — that's the gold standard option. Spring water is plain water sourced from a specific location and contains no added salt, no oils, no flavourings. A small tin of sardines in spring water, drained, is a near-perfect occasional dog treat: high-quality protein, omega-3 fatty acids (EPA and DHA), B vitamins, vitamin D, and calcium from the small bones.
Why sardines specifically? Of all oily fish, sardines have the best balance for dogs:
• They're a small species so they accumulate less mercury than tuna or large salmon. • They're low in pollutants compared to longer-lived predator fish. • The small bones are soft and edible — a complete calcium source. • The omega-3 content (around 1.5g per tin) supports skin, coat, joints, and brain function.
We've written more detail on each variant in dedicated pages — see our guides on sardines in spring water, sardines in brine, sardines in olive oil, and sardines in tomato sauce.
Quick summary of the variants:
• Sardines in spring water — best option. Drain and serve. • Sardines in water — also fine, drain first. • Sardines in brine — too much salt. Rinse thoroughly before serving, or skip. • Sardines in olive oil — extra fat. OK occasionally, drained, for healthy dogs. Skip for pancreatitis-prone dogs. • Sardines in sunflower oil — same as olive oil but the oil quality is worse. Drain well. • Sardines in tomato sauce / chilli / lemon — too many added ingredients, often onion or garlic. Skip.
How much? A small breed dog (under 10kg): one or two sardines, twice a week. Medium dog (10-25kg): half a tin, twice a week. Large dog (25kg+): a full tin twice a week. Sardines are calorie-dense (a small tin is ~190 kcal) and high in fat — overdoing it causes pancreatitis risk and weight gain.
Salt content matters. UK supermarket sardines in spring water typically have 0.5-0.8g salt per tin, which is fine for dogs in moderation. Sardines in brine have 1.5-2g+ per tin, which is too much. Rinse if you've bought brine; better to switch brands.
Risks to watch for
- Salt in brine-packed versions
- Fat overload in oil-packed versions
- Mild fishy breath afterwards
Potential benefits
- Excellent omega-3
- Calcium from bones
- Protein
- Supports skin and joints
Safe portion size
One or two sardines in spring water, two or three times a week.
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