Can cats eat ketchup? No — why, and what to do
Quick answer: No — ketchup is not safe for cats and should never be given.
Quick verdict
Unsafe
Key risk
Onion and garlic toxicity plus salt and sugar make it dangerous.
Why
Ketchup contains toxic onion and garlic and is salty and sugary, so avoid it for cats.
Can cats eat ketchup, and why?
Ketchup contains toxic onion and garlic and is salty and sugary, so avoid it for cats. Onion and garlic toxicity plus salt and sugar make it dangerous.
Cats are obligate carnivores: they must get most of their nutrition from meat and need nutrients such as taurine that only animal products provide. They lack some enzymes for processing plants and carbohydrates, so fruit and veg offer little benefit and can upset their stomach; many cats are also lactose intolerant.
Warning — what to watch for
Onion and garlic toxicity plus salt and sugar make it dangerous.
If your cat has eaten ketchup, don’t wait for symptoms — contact your vet immediately, or call the Animal PoisonLine on 01202 509000 (24/7, UK). Signs of a problem can include vomiting, diarrhoea, drooling, lethargy, tremors or loss of appetite.
🚨 Find an emergency vet near youMore foods cats might eat
Keep ketchup out of reach
If your cat has eaten ketchup, ring your vet — do not wait to see what happens. For preventing a repeat:
Plush Snuffle Foraging Mat
A roll-up plush snuffle mat with cute animal designs. Hide treats in the folds and let your pet sniff and forage to find them - a rewarding enrichment game that beats boredom and slows feeding.
£13.99
Tarhong Paw Ikat Teal Pet Placemat – BPA-Free PVC & EVA
A vibrant teal ikat placemat with paw print accents — BPA-free, wipe-clean, and 29 × 48 cm for protecting floors under pet bowls.
£8.49
Tarhong Concentric Circle Slow Feeder Bowl for Dogs & Cats
A stylish slow-feeder bowl that encourages healthier, calmer mealtimes — available in blue, grey, or white.
£14.99
Tarhong Country Orchard Melamine Pet Saucer
A pretty fruit and floral orchard-print melamine saucer for pets — BPA-free, non-slip, shatterproof, and dishwasher safe at 13.2 cm.
£9.49
Feeding & nutrition guides
Frequently asked questions
Can cats eat ketchup?
Unsafe. Ketchup contains toxic onion and garlic and is salty and sugary, so avoid it for cats.
What happens if my cat eats ketchup?
Onion and garlic toxicity plus salt and sugar make it dangerous. If your cat has eaten ketchup, contact your vet or the Animal PoisonLine (01202 509000) straight away — don’t wait for symptoms.
Is ketchup poisonous to cats?
Unsafe. Ketchup contains toxic onion and garlic and is salty and sugary, so avoid it for cats.
Free printable: safe & toxic foods for cats
ketchup is just one food — get the full one-page checklist of what’s safe, fine in moderation, or dangerous for cats. Vet-sourced, yours to print and keep.
Check ketchup for another pet
Sources
Our verdict on whether cats can eat ketchup draws on established UK and US veterinary and welfare organisations. Individual pets, quantities and preparation vary — always confirm with your own vet.