Can my dog eat ketchup?
No.
Sauces are salt, sugar, vinegar and usually onion and garlic powder. A lick isn't an emergency.
Already ate it?
If they ate itA lick is fine. If they ate a lot — a bottle of sauce or a bowl of mayo — call your vet.
Watch forVomiting or diarrhoea within a day; a hunched, painful belly after a lot of mayonnaise; weakness or pale gums days later after a lot of a garlic-heavy sauce.
Thinking of giving it?
WhyMayonnaise adds a heavy fat load on top. Mustard seed is its own irritant.
Where this comes from. Merck Veterinary Manual — Allium spp Toxicosis in Animals; Merck Veterinary Manual — Pancreatitis in Dogs and Cats; Merck Veterinary Manual — Salt Toxicosis in Animals.
Reviewed: 20 October 2026
A guide, not a diagnosis. If your dog seems unwell, call your vet.
Nothing on the never list is in a Wagbowl bowl. No onion, no garlic, no salt.
Build your dog's bowl
