Is Avocado Toxic to Dogs? Persin, Pits and Guacamole

By Tailwisp Editorial TeamUpdated October 17, 20263 min read

Avocado has a reputation as dangerous to pets, but the truth is more nuanced. Dogs are less sensitive than birds, horses and some livestock, yet there are other reasons to be careful with this fatty fruit.

What is persin?

Persin is a fungicidal toxin found in avocado leaves, bark, skin, pit and, in smaller amounts, the fruit. It is highly toxic to birds, rabbits, horses and some other animals, causing heart and respiratory problems. Dogs and cats are more resistant, but large amounts could still cause vomiting and diarrhea. The amount varies between varieties.

The pit: the biggest risk

The large, round pit is slippery and hard. Dogs can swallow it whole, and it can lodge in the esophagus, stomach or intestine, causing a life-threatening obstruction. It also contains small amounts of persin. If your dog swallows a pit, call your vet immediately. Signs of blockage include repeated vomiting, loss of appetite, abdominal pain, lethargy and straining. Do not wait. See what to do for poisoning and emergencies.

Skin and leaves

The skin is tough and contains more persin than the flesh. Leaves and bark have the highest amounts. Keep dogs away from avocado trees, and avoid giving skin or leaves.

Flesh and fat

Avocado flesh is rich in fat, around fifteen percent by weight. A large amount can cause vomiting, diarrhea and stomach upset, and a sudden fatty meal can trigger pancreatitis in susceptible dogs. See pancreatitis in dogs and table scraps and fatty foods. A tiny taste of flesh is unlikely to harm most dogs, but it provides little benefit, and there are safer treats.

Guacamole and avocado dishes

Guacamole often contains onion, garlic, salt, lime and spices. Onion and garlic are toxic. See onions and garlic. Avocado toast, sushi and salads contain many other ingredients that dogs should not eat.

Avocado in dog foods

Some pet products contain avocado oil or meal in small, controlled amounts. This is a manufacturer decision, and these foods follow nutritional rules. Do not use this as permission to feed fresh avocado in quantity.

Signs to watch for

• Vomiting and diarrhea
• Abdominal pain
• Lethargy
• Loss of appetite
• Difficulty swallowing or gagging, which can mean a pit is stuck

Contact your vet if you see these signs.

What to do if your dog ate avocado

1. Remove any remaining fruit, skin and pit, and check how much is missing.
2. If the pit may be swallowed, call your vet immediately.
3. For flesh or skin only, call your vet for advice if your dog is small, ate a large amount or has any signs.
4. Monitor your dog for several days for digestive signs.

Safer alternatives

Try other treats, such as small pieces of carrot or apple. See carrots and apples.

Avocado trees and gardens

If you grow avocados, keep dogs away from fallen fruit, leaves and bark, and clear pits promptly. Mulch made from avocado trimmings can be a risk if dogs chew it. Dogs that have a habit of eating garden plants may need a fenced area or supervision. If you are not sure whether a plant is safe, check with your vet or a poison helpline before letting your dog roam.

Skin and hair products

Some cosmetic and grooming products contain avocado oil. A dog licking a small amount of such a product off its coat is unlikely to be harmed, but fragrance, essential oils and other ingredients may be a bigger concern. Choose products designed for dogs, and rinse thoroughly after bathing.

The takeaway

Avocado flesh is not highly toxic to dogs, but the pit is dangerous, and the fat and common additions cause trouble. Skip it as a treat.

This article is general educational information, not veterinary advice. Every dog is different. If your dog is unwell, or you are unsure about a symptom, diet change or medication, contact your veterinarian.