Can Dogs Eat Walnuts? No — Walnuts Are Risky for Dogs

Walnuts might seem like a harmless nut, but they're one of the riskier options for dogs. Here's why most vets recommend keeping walnuts away from dogs entirely.

Are Walnuts Safe for Dogs?

Walnuts are not recommended for dogs for several reasons:

• Mold toxins (mycotoxins): Walnuts, especially older or improperly stored ones, are prone to developing mold that produces tremorgenic mycotoxins. These toxins cause vomiting, tremors, and seizures in dogs — a condition called walnut poisoning or mycotoxin toxicosis.
• Black walnuts: Black walnuts (common in North America) are particularly toxic to dogs and can cause severe GI upset, tremors, and neurological symptoms even without mold.
• Size and shape: Walnuts are large enough to cause intestinal blockage, especially in small and medium dogs.
• High fat content: Can trigger pancreatitis with repeated exposure.

English Walnuts vs Black Walnuts

• English walnuts (common grocery store variety): Not acutely toxic when fresh, but mold risk and fat content make them inadvisable
• Black walnuts: Toxic to dogs — avoid completely

Signs of Walnut Toxicity in Dogs

• Vomiting
• Tremors or muscle twitching
• Seizures
• Lethargy and weakness
• Loss of coordination

If your dog eats walnuts and shows any of these signs, contact your vet immediately.

For a safe nut-based treat, Reggie Calming Spread for Dogs is made from 100% natural peanut butter — xylitol-free and formulated with calming melatonin and L-theanine. All the nut-butter satisfaction with none of the walnut risk.

Final Thoughts

Walnuts are not worth the risk for dogs. The mold toxin concern, blockage risk, and fat content make them a treat to avoid entirely. Stick to dog-safe alternatives and keep walnuts out of reach.