Can Dogs Eat Macadamia Nuts?

Verdict: TOXIC — never feed macadamia nuts to dogs.

Macadamia nuts cause a distinctive toxic syndrome in dogs: weakness, incoordination, tremors and fever. Symptoms usually appear within 12 hours of ingestion.

Why it's dangerous

The exact toxin in macadamia nuts is not fully identified, but dogs are uniquely sensitive to them. Even small amounts can cause signs. The nuts are also high in fat, which adds the risk of pancreatitis.

Symptoms

• Weakness (especially in the hind legs)
• Incoordination, stumbling
• Depression, lethargy
• Vomiting
• Tremors
• Elevated body temperature (hyperthermia)

Symptoms usually start within 12 hours of ingestion. Most dogs recover within 24-72 hours with supportive care, but some need veterinary treatment.

How much is dangerous?

Toxicity has been reported at roughly 2.4g of macadamia nuts per kg of body weight — that's just a few nuts for a small dog. Even a handful can cause signs. Chocolate-covered macadamias are doubly dangerous (chocolate + macadamia).

What to do if your dog eats macadamia nuts

1. Call your veterinarian or poison control.
2. Do NOT induce vomiting at home unless instructed.
3. The vet may induce vomiting if ingestion was recent.
4. Supportive care (IV fluids, anti-nausea medication, pain relief) speeds recovery.
5. Most dogs recover fully within 24-72 hours.

FAQ

Are macadamia nuts fatal to dogs?

Rarely — with supportive care most dogs recover in a few days. But they can be very sick, and complications (like pancreatitis) can be serious.

How many macadamia nuts are toxic?

As few as a handful can cause signs in a small dog. There's no safe amount — keep them away.

Can dogs eat other nuts like almonds or walnuts?

They're not as toxic as macadamias, but they're high in fat and can cause vomiting, diarrhea and pancreatitis. Some nuts (like moldy walnuts) are dangerous. Best to avoid all nuts.

What if my dog ate chocolate-covered macadamias?

That's a double emergency (chocolate + macadamia) — call your vet or poison control immediately.

Sources

• ASPCA: People Foods to Avoid Feeding Your Pets (aspca.org)
• VCA Animal Hospitals: Macadamia Nut Toxicity in Dogs (vcahospitals.com)