Can dogs eat onions?
UNSAFE Category: Vegetable · Reviewed September 2026
Onions, in every form — raw, cooked, powdered or dehydrated — damage dog red blood cells through N-propyl disulfide, causing hemolytic anemia. Cats and Japanese breeds like Shiba Inu and Akita are especially sensitive, but all dogs are at risk. Onion powder in baby food, soups and seasonings makes accidental poisoning common.
Symptoms to watch for
- lethargy
- pale gums
- red or brown urine
- weakness
- rapid breathing
If you suspect poisoning: call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 (available 24/7). Do not induce vomiting unless instructed by a professional.
Quick answers
Can dogs eat onions?
No. Onions, in every form — raw, cooked, powdered or dehydrated — damage dog red blood cells through N-propyl disulfide, causing hemolytic anemia. Cats and Japanese breeds like Shiba Inu and Akita are especially sensitive, but all dogs are at risk. Onion powder in baby food, soups and seasonings makes accidental poisoning common.
What are the symptoms if my dog eats onions?
Watch for lethargy, pale gums, red or brown urine, weakness, rapid breathing. Symptoms may appear within hours; when in doubt, call your vet.
What should I do if my dog ate onions?
Call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 right away. Do not wait for symptoms — early treatment is dramatically cheaper and safer.
Related foods
Can dogs eat garlic? · Can dogs eat wild mushrooms? · Can dogs eat tomatoes? · Can dogs eat potatoes? · Can dogs eat pickles? · Can dogs eat carrots?
Source: ASPCA Animal Poison Control. This page is informational and is not veterinary advice.