Last reviewed: August 2026

Can Dogs Eat Macadamia Nuts?

Toxic —
Mechanism UnknownDanger

No. Macadamia nuts are toxic to dogs, causing weakness, tremors, and fever. Unusually for a well-established toxicity, scientists still don't know exactly which compound in the nut causes the reaction — but the clinical pattern is well documented.

Why macadamias are toxic — what's known and what isn't

We're being direct about this one: despite macadamia toxicosis being recognised in dogs for decades, the specific toxic compound has not been conclusively identified. What vets do know, from consistent clinical cases, is the dose range and symptom pattern — ingestion around 2.4g of nuts per kg of body weight is enough to trigger signs in most dogs.

Unlike grape or xylitol toxicity, macadamia toxicosis is rarely fatal on its own and most dogs recover within 24–48 hours with supportive care. The real danger multiplies when macadamias are combined with chocolate — macadamia nut cookies or baked goods being a common real-world exposure — since the two toxicities stack.

Symptoms & timeline

Time after ingestion	What to expect
3–12 hours	Weakness, especially in the hind legs — dogs often can't stand normally
Same window	Vomiting, tremors, elevated body temperature, lethargy
24–48 hours	Most uncomplicated cases resolve with supportive care

What to do if your dog ate macadamias

Call your vet, especially if the nuts were part of a baked good that might also contain chocolate or xylitol.
Check what else was in the product — this changes the treatment priority significantly.
Expect supportive care: most dogs are monitored and treated symptomatically rather than needing aggressive intervention, unless another toxin is also involved.

Sources

Merck Veterinary Manual, "Macadamia Nut Toxicosis in Dogs."
ASPCA Animal Poison Control Center, macadamia toxicity clinical guidance.

This page is general educational information, not a substitute for veterinary advice.