Can dogs eat mayonnaise?

Caution — fatty, sometimes with problematic ingredients

Plain mayonnaise isn't toxic but it's almost pure fat, making it a pancreatitis risk. Some flavoured mayos contain garlic or mustard.

The full picture

Mayonnaise is essentially oil, egg, and vinegar — not poisonous, but nutritionally awful for dogs. The fat content makes it a pancreatitis trigger, and regular feeding contributes to obesity. Flavoured mayonnaises (aioli, garlic mayo, chipotle mayo, honey mustard) add garlic, spices, or sugar. If your dog licks a sandwich or salad with mayo, it's not an emergency, but don't share deliberately. Light mayo is still high-fat. Salad cream is similar.

If your dog ate more than a safe amount

Risks to watch for

  • Pancreatitis from fat content
  • Garlic in flavoured mayos
  • Raw egg risk in homemade
  • Weight gain

Safe portion size

Not recommended.

Safer alternatives

  • Plain yoghurt (small amount)

Related foods

Cream cheese caution Peanut butter caution
Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the Animal PoisonLine on 01202 509000 in the UK.