No. Green onions, also called scallions or spring onions, are Alliums just like bulb onions, and they are toxic to cats. Both the green tops and white bases can damage red blood cells and cause anemia, so keep them out of anything your cat might eat.
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Danger — scallions are toxic to catsTreat it as a poisoning risk
Can cats eat green onions? 🧅
No. Green onions, also called scallions or spring onions, are Alliums just like bulb onions, and they are toxic to cats. Both the green tops and white bases can damage red blood cells and cause anemia, so keep them out of anything your cat might eat.
Source-linked record · Last reviewed July 17, 2026 · Not veterinary advice
Why this answer
Green onions are young onions, and both the green stalks and white bulbs contain the organosulfur oxidants that harm feline red blood cells and cause Heinz-body anemia. They often appear raw and chopped as a garnish, which makes them easy for a cat to swipe off a plate of noodles or rice.
Watch for
Pale gums
Weakness and low energy
Rapid breathing or heartbeat
Discolored, dark urine
Poor appetite and vomiting
How much is okay
None — do not garnish food with green onions where a cat can reach it, and keep chopped scallions off shared plates.
Keep it away
Keep scallion-topped dishes like ramen or tacos out of a cat's reach.
Do not offer a cat leftovers garnished with green onion.
Store fresh green onions in the fridge, not on a low counter.
Sources and evidence notes (3)
Allium spp Toxicosis in Animals
Merck Veterinary Manual — Onion, garlic, leek, and chive toxicosis: organosulfur oxidants cause Heinz-body hemolytic anemia; cats are notably more sensitive than dogs; raw, cooked, and powdered forms are all hazardous.
People Foods to Avoid Feeding Your Pets
ASPCA Animal Poison Control Center — Multi-species veterinary toxicology list covering alcohol, chocolate, caffeine, citrus, coconut, grapes and raisins, macadamia nuts, milk and dairy, nuts, onions, garlic and chives, raw meat and eggs, salty snacks, xylitol, and yeast dough.
Poisons
Cornell Feline Health Center, Cornell University College of Veterinary Medicine — Feline-specific poisoning overview covering common household toxin exposures in cats, clinical signs, and the need for prompt veterinary care.
Answer card
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Remove access. Take the food away and move your cat to another room.
Note the facts. What was it, roughly how much is missing, and when? Keep the packaging.
Call before symptoms. For chocolate, onion, garlic, grapes, raisins, alcohol, or anything sugar-free (xylitol), call a hotline or your veterinarian now — early treatment is easier and cheaper.
Never do this
Do not induce vomiting, feed milk, salt, or oil, or wait overnight to "see how it goes". Signs of chocolate or Allium poisoning can take hours to days to appear.
Go to an emergency vet immediately if
Your cat is collapsing, twitching or seizing, struggling to breathe, drooling heavily, vomiting repeatedly, or wobbly on their feet.
Outside the US? Call your local emergency veterinary clinic — keep the number saved in your phone.
Effective: July 17, 2026
Can Cats Eat It? provides general educational information for cat owners. It is not veterinary, diagnostic, treatment, or emergency advice.
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