Why macadamia nuts are dangerous
Macadamia nuts are one of the few foods known to be specifically toxic to dogs. The exact toxin isn't fully understood, but even small amounts can make a dog ill. They are among the most common nut-related poisonings vets see, so they should never be shared, even as a tiny piece.
Symptoms of macadamia poisoning
Signs usually appear within 12 hours and may include:
- Weakness, especially in the hind legs (a hallmark sign — dogs may struggle to stand or walk)
- Vomiting and lethargy
- Tremors or shaking
- Fever (elevated body temperature)
The good news: poisoning is rarely fatal, and most dogs recover within 24–48 hours with supportive veterinary care. Double the concern if the nuts were in chocolate or cookies, which add their own toxicity.
What to do if your dog eats macadamia nuts
- Call your vet or a pet poison line right away — note how many nuts and your dog's weight.
- Don't wait for symptoms; early advice is best.
- Watch for weakness, vomiting, and tremors over the next 12–24 hours.
Frequently asked questions
What if my dog ate just one macadamia nut?
Call your vet for advice. Small dogs can react to very little, and signs can still appear. It's safest to check rather than wait.
Are other nuts safe for dogs?
Most nuts aren't toxic like macadamias, but they're high in fat (risking pancreatitis) and can be choking hazards. Macadamia nuts and any moldy nuts are the most dangerous; it's simplest to avoid nuts altogether.
Are macadamia nuts in cookies dangerous?
Yes — and often worse, because the cookies may also contain chocolate, butter, and sugar. Keep all macadamia baked goods away from dogs.
Other toxic foods: grapes · chocolate · full food checker.