Is Pesto Safe for Dogs?
According to veterinary and pet-nutrition sources including the American Kennel Club and PetMD, pesto is considered unsafe for dogs. This classification is not due to a single ingredient in isolation, but to the typical combination of ingredients used in pesto recipes.
Veterinary literature consistently identifies garlic as the primary concern. Garlic is listed as toxic to dogs by veterinary toxicology organisations and is a standard ingredient in most pesto varieties.
Why Pesto Can Be Dangerous for Dogs
Garlic and onion
Veterinary toxicology sources classify garlic and onion as toxic to dogs. These ingredients can damage red blood cells and are commonly present in pesto in fresh or powdered form.
High fat content
Pet-nutrition articles frequently note that pesto contains oils, nuts, and cheese, resulting in high fat levels that may contribute to digestive upset or pancreatic irritation.
Salt and seasonings
Veterinary sources also highlight added salt and seasonings as concerns in prepared pesto products.
Signs Reported When Dogs React to Pesto
Veterinary sources list the following signs associated with ingestion of foods containing garlic, onion, or high fat levels:
- Vomiting
- Diarrhoea
- Lethargy
More serious signs
- Weakness linked to garlic or onion toxicity
- Gastrointestinal distress associated with rich, fatty foods
Ingredients or Additives of Particular Concern
Veterinary and pet-safety sources consistently identify the following as problematic in pesto:
- ❌ Garlic (fresh, cooked, or powdered) — classified as toxic to dogs
- ❌ Onion or shallots — toxic to dogs
- ❌ High oil content — associated with digestive upset
- ⚠️ Cheese and salt — contribute to fat and sodium intake
Puppies vs. Adult Dogs
Veterinary sources indicate that both puppies and adult dogs are susceptible to the toxic effects of garlic and onion. Smaller dogs and puppies may experience effects at lower exposure levels due to body size.
Other Common Variants of Pesto
Basil pesto
Veterinary literature discusses basil pesto as the most common variety, typically containing garlic and oil.
Spinach or kale pesto
Pet-nutrition sources note that alternative pestos often still contain garlic, oil, and salt.
Store-bought pesto
Veterinary sources frequently identify packaged pesto as higher risk due to preservatives, salt, and concentrated ingredients.
Dog-Friendly Alternatives Mentioned in Pet-Safety Sources
Veterinary and pet-nutrition articles commonly reference the following as safer dietary components:
- Plain foods without seasoning
- Commercial dog foods
- Foods formulated specifically for canine consumption
Frequently Asked Questions (FAQ)
This FAQ summarises themes appearing in veterinary pet-safety articles.
It is informational only and not a substitute for professional veterinary care.
Is pesto toxic to dogs?
Veterinary sources classify pesto as unsafe due to the frequent presence of garlic and onion, which are toxic to dogs.
Is basil itself the problem?
Pet-safety sources explain that basil is not the main concern; the risk comes from added ingredients such as garlic, oil, and salt.
Is homemade pesto safer than store-bought?
Veterinary literature notes that homemade pesto commonly contains the same toxic ingredients, particularly garlic.
Source Reference
This page compiles information from publicly accessible veterinary and pet-nutrition resources, including:
-
American Kennel Club (AKC) — “Can Dogs Eat Pesto?”
https://www.akc.org/expert-advice/nutrition/can-dogs-eat-pesto/ -
PetMD — “Can Dogs Eat Pesto?”
https://www.petmd.com/dog/nutrition/can-dogs-eat-pesto
This page is informational only and does not constitute veterinary or medical advice. Readers are encouraged to review these sources directly.
