<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PK9D66" height="0" width="0" style="display:none;visibility:hidden" title="gtm-frame"></iframe>Acorns are poisonous to dogs | Agria Pet Insurance
03330 30 10 00
Get a quote
My AccountGet a quote

Back to Guides and advice

Acorns are poisonous to dogs

Acorns in larger quantities can cause vomiting, diarrhea and other poisoning symptoms in dogs. Both acorns and chestnuts can also cause intestinal blockage. Here we teach you why you should be vigilant on autumn walks.

During autumn, acorns and chestnuts fall to the ground. To a curious or voracious dog, they can look both exciting and yummy. Therefore, be careful when walking near oaks or chestnut trees. Please keep your dog on a leash and under supervision if you think it's likely to eat off the floor.

Symptoms of Acorn Poisoning

  • Howling or vomiting
  • Lethargy
  • Won't eat
  • Becomes constipated then get a tar-like diarrhoea within 2-10 days

Dogs that ingest large amounts of acorns may experience vomiting and diarrhoea. If it turns out that your dog has been poisoned, a veterinarian can give activated charcoal and treat it for stomach pains, constipation and diarrhoea.

What happens if your dog eats acorns?

Acorns contain large amounts of tannin. Tannin is corrosive and causes inflammation in the walls of the gastrointestinal tract and can in some cases damage the kidneys and liver. Acorns can also lead to intestinal blockage.

Real chestnuts vs horse chestnuts

Real chestnuts are harmless but can block the intestine. As well as blocking the intestine, horse chestnuts can cause vomiting and diarrhoea - a large intake can cause serious poisoning.

When should I contact the vet?

If your dog vomits, has diarrhoea or seems unwell, you should always contact a veterinarian.

Frequently asked questions about acorn poisoning

Previous article

Toads are poisonous to dogs

Next article

How to work out your horse's weight

Related guides and advice


Follow us


For UK customers:
Agria Pet Insurance Ltd is authorised and regulated by the Financial Conduct Authority, Financial Services Register Number 496160. Agria Pet Insurance Ltd is registered and incorporated in England and Wales with registered number 04258783. Registered office: First Floor, Blue Leanie, Walton Street, Aylesbury, Buckinghamshire, HP21 7QW. Agria insurance policies are underwritten by Agria Försäkring.


For Guernsey customers:
Clegg Gifford Channel Islands Limited is licensed by the Guernsey Financial Services Commission. Ref: 2722221. Registered office: Admiral House, Place Du Commerce, St Peter Port, Guernsey GY1 2AT.

© 2024 Agria Pet Insurance Ltd. All Rights Reserved.