Macadamia Nut Toxicity Calculator for Dogs

Q: Is macadamia toxicity usually fatal?

No, macadamia nut toxicosis in dogs is generally non-fatal, and most dogs recover fully within 12 to 48 hours with supportive veterinary care.

Q: Are macadamias toxic to cats too?

Toxicosis from macadamia nuts has to date only been documented in dogs.

Q: What if the nuts were in a baked good like a cookie?

Treat it as more urgent, since baked goods containing macadamias often also contain chocolate, raisins, or xylitol, all separately toxic to dogs.

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Toxicity Assessment

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🚨 Disclaimer: This calculator is for educational purposes. If your dog has eaten any amount of macadamia nuts, call your veterinarian immediately.

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Why Macadamias Are Toxic

While the exact toxic principle remains unknown, ingestion of even small amounts of macadamia nuts can cause macadamia nut toxicosis in dogs. Symptoms usually appear within 12 hours of ingestion.

Common Symptoms to Watch For

Weakness in hindquarters: Often the first sign; dogs may struggle to stand or walk.
Hyperthermia: An abnormal rise in body temperature.
Tremors & Pain: Generalised tremors and significant abdominal discomfort.
Vomiting & Lethargy: Classic signs of toxic ingestion.

Toxicity Thresholds

Clinical signs have been reported in dogs at ingestion levels as low as 0.7g of nuts per kilogram of body weight, with experimental studies showing signs consistently from around 2.4g/kg upward. Because individual sensitivity varies significantly, no dose should be considered "safe."

Frequently Asked Questions

No — unlike some other toxins, macadamia nut toxicosis in dogs is generally non-fatal, and most dogs recover fully within 12 to 48 hours with supportive veterinary care. That said, it still causes real distress and warrants prompt veterinary attention.

Toxicosis from macadamia nuts has, to date, only been documented in dogs. That said, nuts in general are not a recommended food for cats and can pose other risks like choking or digestive upset.

Treat it as more urgent, not less. Baked goods containing macadamias often also contain chocolate, raisins, or xylitol — all separately toxic to dogs — so the combined risk can be higher than macadamias alone.

Not without professional guidance. Call your vet or the Animal Poisons Helpline first — they can advise whether inducing vomiting is appropriate for your specific situation and how long ago the ingestion occurred.

Toxicity Assessment

Why Macadamias Are Toxic

Common Symptoms to Watch For

Toxicity Thresholds

Frequently Asked Questions

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