Toxic — Avoid for dogs — raw, cooked, or powdered — all forms are a problem.

Toxic — Avoid for cats — cats are actually more sensitive to onions than dogs are.

What should I do if my pet already ate it?

If you know or suspect they’ve eaten this, contact your vet or an animal poison control hotline right away — don’t wait for symptoms to show up. Try to note how much they ate and when, and keep any packaging — it helps whoever you call give faster advice.

🥕 Vegetable

Can dogs and cats eat onions?

Damages red blood cells over time — a little now and then can add up.

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Educational only — not a substitute for veterinary advice. If you know or suspect your pet ate something dangerous, contact your vet or an animal poison control hotline right away.

🐶 For Dogs

☠️ Toxic — Avoid

raw, cooked, or powdered — all forms are a problem

🐱 For Cats

☠️ Toxic — Avoid

cats are actually more sensitive to onions than dogs are

Why it matters

Onions (and the whole allium family) contain compounds that damage red blood cells, which can lead to anemia.
Cooking doesn’t make onions safe — powdered onion in seasoning blends, broths, and sauces counts too.
The effect can be cumulative, so repeated small exposures are also a concern, not just one big serving.

Serving tips

Keep onion (and onion powder) out of anything your pet eats, including table scraps and homemade broths.
Double-check seasoned or sauced leftovers before sharing — onion powder hides easily.

Symptoms to watch for

Lethargy or weakness
Pale or yellowish gums
Reddish urine

When to get help

If you know or suspect they’ve eaten this, contact your vet or an animal poison control hotline right away — don’t wait for symptoms to show up.
Try to note how much they ate and when, and keep any packaging — it helps whoever you call give faster advice.

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