Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
Brief Answer
No, walnuts are not safe for dogs. They are prone to developing tremorgenic mycotoxins from mould, which can cause seizures and neurological symptoms. Black walnuts are especially dangerous, and even English walnuts pose choking and pancreatitis risks.
The Full Picture
Walnuts, especially black walnuts, are dangerous for dogs. Like pecans, they are prone to developing tremorgenic mycotoxins from mould, which can cause seizures, tremors, and neurological symptoms. Along with macadamia nuts, walnuts are among the most dangerous nuts for dogs. Even English walnuts, while not directly toxic, are large enough to be choking hazards and are very high in fat, which can cause pancreatitis. Their size and shape also risk causing intestinal blockage, particularly in smaller dogs. Avoid all walnuts — there are much safer treat options available.
Signs to Watch For
- Seizures and tremors from mould-produced mycotoxins
- Vomiting and diarrhoea
- Neurological symptoms including disorientation and incoordination
- Intestinal obstruction from the large nut size
- Pancreatitis due to very high fat content
If your dog eats walnuts, particularly black walnuts or any that appear mouldy, contact your vet immediately. Watch for signs of tremors, seizures, or vomiting and seek urgent veterinary care if these develop.
What You Should Know
Walnuts should be kept well away from dogs. If your dog has eaten walnuts, watch for symptoms such as vomiting, diarrhoea, lethargy, or loss of appetite. In an emergency, contact your veterinarian or an animal poison helpline straight away.