Are Conkers and Acorns Poisonous to Dogs?
Updated August 2026 Summary: Conkers and acorns can both make dogs unwell when chewed or swallowed. Conkers contain aesculin, while acorns contain tannins. Both can cause vomiting, diarrhoea, abdominal discomfort and loss of appetite. Their size and hardness also create choking and intestinal blockage risks. Serious poisoning is uncommon, but you should contact your vet…