Safety guide

Is Onions safe for dogs?

Toxic — emergency

Onions destroy red blood cells and cause haemolytic anaemia in dogs.

All forms of onion — raw, cooked, powdered — contain compounds that damage red blood cells. Powdered or dehydrated forms are more concentrated. Symptoms may be delayed by several days.

Symptoms to watch for

  • Weakness
  • Pale gums
  • Vomiting
  • Lethargy
  • Reddish urine
ASPCA Poison Control · 1-888-426-9738

Available 24/7. A consultation fee may apply.

When to call your vet

Your dog ate a significant amount of onion (more than 0.5% of body weight) in any form.

Sources: ASPCA · Merck Veterinary Manual

For guidance only — this doesn't replace veterinary advice. When in doubt, contact your vet.

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