Can Cats Eat Onions? NZ Safety Answer
Can cats eat onions in NZ? No. Onion, garlic, chives and leeks are unsafe for cats. What to do and safer alternatives.
Quick answer
No. Cats should not eat onions. VCA's cat toxic-hazard guidance lists onion, chives, leeks, shallots and garlic as hazards for cats, and ASPCA also lists onion and garlic among people foods pets should avoid.
Why
Onion is often hidden in foods cats may lick or steal: gravy, mince, roast leftovers, soups, sauces, baby food, pizza toppings and seasoned tuna or chicken. Powdered onion and garlic seasoning still count. This is a bigger risk in shared kitchens where plates are left out after dinner.
If your cat ate it
Contact your NZ vet, after-hours emergency clinic, or SPCA for advice.
Safer alternatives
Use complete cat food or a cat-specific treat. If you want to offer plain cooked meat, ask your NZ vet what is suitable for your cat and keep it unseasoned.
Related reading
- Cat Food Guide NZ
- Cat Care NZ Complete Guide
- New Kitten Checklist NZ
- Pet Emergency Kit NZ Civil Defence Guide
References
- VCA Animal Hospitals, Toxic Household Hazards for Cats, checked 2026-06-11: https://vcahospitals.com/know-your-pet/household-hazards-toxic-hazards-for-cats
- ASPCA Animal Poison Control, People Foods to Avoid Feeding Your Pets, checked 2026-06-11: https://www.aspca.org/pet-care/aspca-poison-control/people-foods-avoid-feeding-your-pets
Important notice
*General food-safety information for NZ pet owners, reviewed against ASPCA/VCA guidance (June 2026). For any suspected ingestion or illness, contact a NZ vet, after-hours emergency clinic, or SPCA for advice.*
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- Cat FoodStart with food that matches your cat's life stage — change brands slowly over 7–10 days to avoid digestive upset.
- Cat LitterClumping or crystal, most cats prefer an unscented litter and a clean tray — one tray per cat plus one spare is the NZ rule of thumb.
- Cat TreatsGreat for bonding and training — keep treats under 10% of daily calories to protect your cat's waistline.
- Cat ToysA small rotation of toys (feather wand, puzzle feeder, and comfort toy) usually works better than buying many at once.
- Cat GroomingRegular brushing cuts hairballs and shedding — essential for long-haired breeds like Ragdolls and British Longhairs.
- Flea & Worm TreatmentFor NZ conditions, choose protection that fits your cat's weight and lifestyle (indoor vs outdoor) and keep it regular.