Can dogs eat Walnuts?
High-fat and a choke risk; moldy walnuts can cause tremors — not a safe snack.
📋What to know
English walnuts in a baked cookie are mostly a fat and calorie problem, plus pieces that can lodge in the gut. They are not the same documented syndrome as macadamia nuts, but they are still a poor treat.
Moldy walnuts — including nuts left outdoors or in damp storage — can carry tremorgenic mycotoxins (often discussed with penitrem A). Dogs that eat spoiled nuts may develop tremors, vomiting and incoordination. Black walnuts have additional GI and toxicity concerns compared with typical grocery English walnuts.
Do not let dogs forage fallen nuts. If walnuts were moldy, unknown, or eaten in quantity, call a veterinarian or poison hotline rather than waiting.
🍽️How to serve it
None. Do not offer walnuts as treats.
🚨Warning signs to watch for
- Vomiting
- Tremors or wobbliness after moldy nuts
- Painful belly
- Choking
⚖️Safe serving size
❓Frequently asked questions
Can dogs eat walnut pieces in banana bread?
Skip it. Even if the nuts look clean, banana bread is fatty, sugary and sometimes xylitol-sweetened. Mold is hard to judge in a baked loaf. Plain banana is a safer conversation than walnut bread.
Why are moldy walnuts a tremor risk?
Certain molds on nuts and other spoiled foods produce tremorgenic mycotoxins. Veterinary sources warn about moldy walnuts in particular. You cannot “see safety.” If mold is possible, treat it as urgent.
Are black walnuts worse than English walnuts?
Black walnuts are more often linked with GI upset and should not be given. Grocery English walnuts are still not a recommended treat because of fat, choke risk and mold if stored poorly.
Related foods
⚕️ This information is for general guidance and is not a substitute for professional veterinary advice. When a pet has eaten something questionable or shows any symptoms, contact your veterinarian or a pet poison control service right away.
Sources: ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets · ASPCA Toxic and Non-Toxic Plant/Food lists · Merck Veterinary Manual — Food Hazards