Ketchup is best kept away from cats. Most brands contain onion and garlic powder along with plenty of salt, sugar, and acid, and concentrated allium powders are more potent by weight than the fresh vegetable. A single lick rarely harms, but ketchup is not a cat food.
✓
206 foods · Source-linked answers · No account, no app
Caution — hidden onion and garlic, plus salt and sugarAmount, form, or frequency matters
Can cats eat ketchup? 🍅
Ketchup is best kept away from cats. Most brands contain onion and garlic powder along with plenty of salt, sugar, and acid, and concentrated allium powders are more potent by weight than the fresh vegetable. A single lick rarely harms, but ketchup is not a cat food.
Source-linked record · Last reviewed July 17, 2026 · Not veterinary advice
Why this answer
Commercial ketchup usually lists onion powder and sometimes garlic powder, and dehydrated allium powders pack more toxin per gram than fresh onion or garlic, so repeated or larger amounts raise the risk of red-cell damage. Add concentrated salt, sugar, and vinegar and ketchup becomes a needless irritant.
Watch for
Stomach upset, vomiting, or diarrhea
Excess thirst from the salt
Lethargy or pale gums if enough allium powder is eaten over time
How much is okay
None worth offering; a stray lick is not a crisis, but ketchup should not be given to cats as a food or topper.
Serve it safely
Wipe ketchup off plates and counters before your cat investigates.
Do not add ketchup to your cat's food.
Keep sauce-covered leftovers, like fries or burgers, out of reach.
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.
Poison List
Pet Poison Helpline — Veterinarian-maintained toxin database for dogs and cats, reachable at (855) 764-7661, with per-substance toxicity levels, signs, and species notes.
Answer card
No food checked yet.
Type what your cat is eyeing — or already stole — and the answer lands right here, without leaving the page.
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.
Use of the guide
Food records summarize cited sources and may not cover every cat, quantity, product formulation, or medical condition. You remain responsible for feeding decisions and for obtaining qualified veterinary help when needed.
No emergency service
This site cannot respond to emergencies. If your cat may have eaten something harmful or is showing concerning signs, contact your veterinarian or an animal poison control service such as ASPCA Animal Poison Control or Pet Poison Helpline.
Availability and changes
We may correct, expand, or remove records as evidence changes. The site is provided as available, without a guarantee that every page will always be uninterrupted or error-free.
Acceptable use
Do not interfere with the site, attempt unauthorized access, or use automated traffic in a way that degrades access for others. Ordinary search-engine crawling and personal reference use are welcome.
Effective: July 17, 2026
This site has no accounts, comments, advertising trackers, cookies, or device identifiers. Food matching runs in your browser after the reviewed data file loads.
Aggregate search statistics
When you submit a search, the site sends the normalized search term, limited to 64 characters, and whether it matched a reviewed food to a same-origin endpoint. These aggregate counts identify no-match searches that may belong on the content roadmap.
The signal carries no cookie, account, or device identifier, and the application does not store raw request identifiers. Cloudflare Analytics Engine provides the aggregate storage and its automatic time field.
Information stored on your device
The site may store a short list of recently viewed food slugs in local browser storage. Use the Clear control beside Recent, or your browser controls, to remove it. It is not sent to an application database.
Infrastructure data
Cloudflare delivers the site and may process technical request information such as IP address, user agent, timestamps, requested URLs, and security signals to operate and protect the service, under Cloudflare's own privacy terms.
Outbound source links
Source links lead to third-party websites. Their privacy practices apply after you leave this site.
Future changes
If accounts, advertising, or materially different collection is added later, this notice will be updated before those features are treated as part of the service.