Ingredients & Drinks
Mayonnaise
Safe in Moderation
A small amount of plain mayonnaise is generally not toxic to dogs, but it is high in fat and may contain ingredients that are inappropriate for dogs.
- High Fat
- Ingredient-Dependent
Safe part
A very small amount of plain mayonnaise without unsafe added ingredients.
Avoid
Large amounts, flavored products containing onion or garlic and products with other potentially harmful ingredients.
Preparation
Check the ingredient list and avoid heavily flavored varieties.
Serving guidance
Very small amounts occasionally, if at all.
Nutritional note
Mayonnaise is high in fat and calories and provides little nutritional benefit for dogs.
Did your dog already eat some?
A small amount of plain mayonnaise is generally not concerning. Larger quantities may cause digestive upset.
Why we say this
Mayonnaise is primarily fat and is calorie-dense. Some flavored varieties may contain onion, garlic or other ingredients that can be harmful to dogs.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- UC Davis School of Veterinary Medicine — Treats and Additional Foods
Confidence: High · Last reviewed 2026-09-10