Can dogs eat walnuts?
The full picture
Walnuts are problematic for multiple reasons. They're high in fat (pancreatitis risk), hard to digest, a choking hazard, and — crucially — they often harbor a mold called Aspergillus that produces tremorgenic mycotoxins. These can cause tremors and seizures within hours of eating moldy walnuts. Black walnuts are considered particularly toxic, but all walnuts carry some risk, especially if not fresh. Add the tough shells (which can cause internal damage or blockage) and the verdict is clear: avoid.
If your dog has already eaten walnuts
{'severity': 'medium', 'steps': ['One or two fresh plain walnuts usually cause only mild stomach upset', 'A larger amount, or any tremors, weakness, or unsteadiness, warrants a vet call', 'Moldy walnuts (found outdoors) are more serious — call the ASPCA Animal Poison Control Center on (888) 426-4435 or Pet Poison Helpline on (855) 764-7661']}
Risks to watch for
- Tremors and seizures from mold mycotoxins
- Pancreatitis from fat
- Intestinal blockage from shells
- Choking hazard
Safe portion size
None recommended.
Safer alternatives
- Blueberries
- Plain xylitol-free peanut butter
- Carrot pieces