Toxic — never feed

Can dogs eat onions?

Dogs should not eat onions. All forms — raw, cooked, powdered, or in broth — can damage red blood cells and lead to anemia.

Not medical advice — general pet-safety info only. Confirm with your vet before changing your dog’s diet.

Updated Aug 3, 2026 Category Nutrition

Safer alternatives to onions

Onion belongs nowhere in a dog treat plan. These options stay onion-free.

Healthy dog treats

Use real dog treats instead of seasoned table scraps.

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Soft dog treats

Soft rewards replace savory leftovers that often hide onion.

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Low-sodium dog treats

Low-sodium treats sidestep salty onion-seasoned foods.

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How much is okay?

Do not offer onions as a treat or seasoning. Keep onion dishes off the floor.

Small under 20 lb
None
Keep it occasional and plainly prepared.
Medium 20–50 lb
None
Keep it occasional and plainly prepared.
Large 50+ lb
None
Keep it occasional and plainly prepared.

Rule of thumb: treats of all kinds should stay under ~10% of daily calories.

How to prepare them

  • Do not feed onion of any kind.
  • Check leftovers for onion, onion powder, and onion broth.
  • Store chopped onion where dogs cannot counter-surf.

Risks & exceptions

  • Onions contain compounds that can cause hemolytic anemia.
  • Powdered onion in seasonings still counts.
  • Symptoms can lag after ingestion.

Onions are not safe for dogs in any typical kitchen form.

If your dog ate any

A larger portion or the wrong preparation is most likely to cause trouble.

Call your vet / pet poison line if:

  • Any onion ingestion
  • Weakness, pale gums, dark urine, lethargy

If your dog ate onion or onion powder, contact a veterinarian or pet poison hotline promptly — do not wait for symptoms.

FAQ

Can dogs eat cooked onions?

No. Cooking does not make onions safe.

Can dogs eat onion powder?

No. Powder is concentrated and still unsafe.

What about onion in leftovers?

Skip the dish — even small amounts add up.

Affiliate disclosure: we may earn a commission from product links. Safety guidance is editorial and may change — verify with your veterinarian for your dog.