Cats should not eat mayonnaise because of its nutritional content.
Mayonnaise is a thick, creamy sauce that’s made by emulsifying oil, egg yolk, and an acid—which can either be vinegar or lemon juice. It is commonly used as a spread, a dipping sauce, a salad dressing, or a base for other sauces.
Mayonnaise is not considered toxic for cats. But since it is high in calories and fat, it is not advisable to give it to your pet regularly. Constant feeding may lead to feline obesity, which can cause more serious health issues.
A small amount of plain mayonnaise can help with constipation issues as long as you stick to the recommended amount suggested by your veterinarian. Don’t go overboard as too much mayo can cause digestive upset and diarrhea. Also, be wary of feeding your cat flavoured mayonnaise. Ingredients such as salt, onion, garlic, chili, and certain herbs are highly poisonous for cats.
What to do if your cat accidentally eats mayonnaise: Find out how much mayonnaise your cat ate. If it’s more than a tiny lick, contact your veterinarian. Observe her for any changes in her mood, behaviour, eating, and litter box habits.
Additionally, review the nutrition facts label and check for toxic ingredients. If she ingested flavoured mayo with harmful ingredients, watch for symptoms of poisoning. These can manifest as: salivation; vomiting; diarrhea; twitching and fitting; difficulty in breathing; shock; collapse; skin inflammation or swelling; depression or coma; and changes in drinking, urinating, and appetite.
In summary: Mayonnaise is a calorie-dense sauce that does not provide the nutrients your cat needs. As much as possible, avoid mixing it with your cat’s food or treats. Instead of giving her mayo, discover which human foods you can safely feed your pet cat through our “can cats eat” blog category.