Can Cats Eat Pesto? A Complete Guide

Wondering if cats can eat pesto? This complete guide explores the ingredients, safety concerns, and alternatives to keep your feline friend healthy and happy!
Author: Veterinary Team
Dial A Vet
Updated
May 25, 2025
|
Published
May 25, 2025
A curious cat sniffing a bowl of pesto on a kitchen counter, exploring potential food options.

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We all know how curious cats can be when it comes to human food. If you’re enjoying a plate of pasta or a slice of bread with pesto and notice your cat sniffing around, you might wonder: Can cats eat pesto? While pesto may seem harmless, it contains ingredients that can be toxic to cats. Let’s dive into everything you need to know about cats and pesto, so you can keep your feline friend safe and healthy.

🍃 What Is Pesto, and Why Is It Problematic for Cats?

Pesto is a delicious sauce traditionally made with basil, garlic, pine nuts, Parmesan cheese, olive oil, and salt. While it’s a favorite for humans, many of these ingredients can be harmful to cats. Cats have different dietary needs and sensitivities, and some common pesto components are toxic to them.

Here’s a closer look at the ingredients in pesto and their potential risks to your cat:

  • Garlic – Extremely toxic to cats, even in small amounts. Garlic can damage their red blood cells, leading to anemia.
  • Pine nuts – High in fat, which can upset a cat’s stomach and cause pancreatitis if consumed in large quantities.
  • Basil – Generally safe for cats in small amounts, but it’s not a necessary part of their diet.
  • Parmesan cheese – Dairy can cause digestive issues in cats, as many are lactose intolerant.
  • Salt – Too much salt can lead to sodium poisoning, which is dangerous for cats.

Even a small taste of pesto could cause issues for your cat, depending on the ingredients and their overall health. It’s best to avoid sharing pesto with your feline friend altogether.

🐾 Symptoms to Watch for if Your Cat Eats Pesto

If your cat accidentally licks or eats pesto, it’s important to monitor them closely for signs of toxicity or digestive upset. Symptoms can vary depending on how much they ate and which ingredients were in the pesto.

Here are some common symptoms to look out for:

  • Vomiting
  • Diarrhea
  • Lethargy
  • Loss of appetite
  • Abdominal pain
  • Pale gums (a sign of anemia from garlic poisoning)
  • Increased heart rate
  • Excessive drooling

Garlic toxicity, in particular, can cause serious symptoms like weakness, rapid breathing, and collapse. If you notice any concerning symptoms or suspect your cat ate a significant amount of pesto, contact your veterinarian immediately.

🍝 What to Do If Your Cat Eats Pesto

If you catch your cat eating pesto or suspect they’ve ingested some, here’s what you should do:

  • Remove the pesto – Immediately take the pesto or any remaining food away from your cat to prevent them from eating more.
  • Check the ingredients – Look at the pesto’s ingredients to determine if it contains garlic, onion, or other toxic substances.
  • Monitor your cat – Keep an eye on your cat for any symptoms of poisoning or digestive distress.
  • Contact your vet – Call your veterinarian for advice, especially if the pesto contained garlic or if your cat is showing symptoms.

Your vet may recommend bringing your cat in for an examination or inducing vomiting to remove the pesto from their system. Never attempt to make your cat vomit at home unless directed by a veterinarian.

🛑 Why Human Foods Like Pesto Are Risky for Cats

While it’s tempting to share your food with your cat, many human foods can be harmful to them. Cats have unique nutritional needs and are obligate carnivores, meaning they require meat to thrive. Foods high in fat, salt, or toxic ingredients can upset their delicate systems and lead to health problems.

Some common human foods to avoid giving your cat include:

  • Chocolate
  • Onions and garlic
  • Grapes and raisins
  • Alcohol
  • Caffeine
  • Foods high in salt or sugar

It’s always best to stick to cat-safe treats and foods specifically formulated for their dietary needs. If you’re unsure whether a particular food is safe, consult your veterinarian before offering it to your cat.

😺 Safe Alternatives to Pesto for Cats

If your cat is curious about what’s on your plate, there are plenty of safe and healthy treats you can offer instead of pesto. Here are some options:

  • Cooked, plain chicken or turkey
  • Small pieces of cooked fish (like salmon or tuna)
  • Commercial cat treats
  • Catnip or cat grass
  • Plain, cooked pumpkin (great for digestion)

These alternatives are not only safe but can also provide your cat with some nutritional benefits. Just remember to offer treats in moderation to avoid overfeeding.

FAQs

Can cats eat basil?

Basil is not toxic to cats and is generally safe in small amounts. However, it’s not a necessary part of their diet and may cause mild stomach upset if consumed in large quantities.

What should I do if my cat eats garlic?

Garlic is highly toxic to cats. If your cat eats garlic, contact your veterinarian immediately. Garlic poisoning can cause serious health issues, including anemia.

Can kittens eat pesto?

No, kittens should not eat pesto. Their smaller size and developing systems make them even more susceptible to the toxic ingredients in pesto.

Is there a pet-friendly version of pesto?

Yes, you can make a pet-friendly pesto by using cat-safe ingredients like basil, parsley, and a small amount of olive oil (without garlic, nuts, or cheese). However, it should only be offered as an occasional treat.

References

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While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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