Can dogs eat macadamia nuts?
No — macadamia nuts are toxic to dogs. Even a small amount can cause weakness in the hind legs, vomiting, tremors, and elevated body temperature. The exact toxic compound has not been identified, but the effects are well-documented. Symptoms appear within 12 hours and typically resolve within 48 hours with veterinary care.
Nuts & Seeds · 718 kcal per 100 g
Benefits and risks
Benefits
Risks
- Toxic to dogs — mechanism unknown but effects well-documented
- Symptoms: weakness (especially hind legs), vomiting, tremors, hyperthermia
- As few as 2-3 nuts can cause symptoms in a small dog
- Toxicity threshold: approximately 2.4 g/kg body weight
- Combined with chocolate (e.g., chocolate-covered macadamias), toxicity compounds
- Extremely high in fat — additional pancreatitis risk
⚠ Toxic threshold
Symptoms can appear at doses as low as 2.4 g/kg body weight (about 0.7 g per pound). For a 20-pound dog, approximately 7 grams (3-4 nuts) can cause symptoms. Chocolate-covered macadamia nuts are doubly dangerous due to combined theobromine and macadamia toxicity.
Recommended serving size
Adjust portions based on your dog's weight, age, and activity level. Treats and snacks should make up no more than 10% of daily calories.
| Dog size | Weight range | Serving |
|---|---|---|
| Small dog | Under 20 lbs (9 kg) | TOXIC — do not feed |
| Medium dog | 20–50 lbs (9–23 kg) | TOXIC — do not feed |
| Large dog | Over 50 lbs (23 kg) | TOXIC — do not feed |
How to prepare and serve
Preparation
Never feed macadamia nuts to dogs in any form — raw, roasted, salted, unsalted, or as an ingredient in cookies, candies, or baked goods. Chocolate-covered macadamia nuts are especially dangerous because they combine two toxins. White chocolate macadamia cookies still contain macadamia toxin even though white chocolate has negligible theobromine. If your dog eats macadamia nuts, call your veterinarian immediately. Note the approximate number of nuts eaten and your dog's weight.
Frequency
Never — toxic to dogs.
Frequently Asked Questions
- Symptoms of macadamia nut poisoning typically appear within 3-12 hours of ingestion. The most characteristic symptom is weakness or inability to stand, especially in the hind legs — dogs may wobble, stagger, or be unable to walk. Other symptoms include vomiting, tremors, lethargy, elevated body temperature (hyperthermia up to 104°F), abdominal pain, and joint stiffness. The good news is that macadamia nut poisoning is rarely fatal when treated — most dogs recover fully within 24-48 hours with supportive care. However, the symptoms can be frightening, and veterinary evaluation is always recommended to rule out other causes and ensure proper monitoring.
- This is one of the mysteries of veterinary toxicology — the specific compound in macadamia nuts that causes toxicity in dogs has never been identified. Cats, humans, and most other animals can eat macadamia nuts without ill effects. Some researchers theorize the toxin may be a processing compound or a naturally occurring fat-soluble substance that dogs metabolize differently than other species. The toxicity was first documented in 1981 in Australia and has been extensively studied since, but the responsible compound remains elusive. What is well-established is the clinical syndrome it produces in dogs: the hind-leg weakness, tremors, and hyperthermia are consistent and reproducible.
- Yes — chocolate-covered macadamia nuts are one of the most dangerous candy combinations for dogs because they deliver two distinct toxins simultaneously. The macadamia nut causes weakness, tremors, and hyperthermia while the chocolate (theobromine and caffeine) causes vomiting, rapid heart rate, hyperactivity, and potentially seizures and cardiac arrest. The effects can compound each other, making the combined toxicity worse than either substance alone. Dark chocolate-covered macadamias are the worst combination. If your dog eats chocolate-covered macadamia nuts, this is a genuine veterinary emergency — call your vet or animal poison control immediately, don't wait for symptoms.
Related nuts & seeds
Almonds
CautionNot toxic but difficult to digest, and the shape makes them a serious choking and obstruction risk.
Cashews
CautionCooked/roasted cashews are safe in very small amounts, but very high in fat. Raw cashews contain urushiol (poison ivy compound).
Peanuts
CautionPlain, unsalted peanuts are safe in moderation. Peanut butter is a classic dog treat — but always check for xylitol.
Pecans
UnsafeContain juglone, a toxic compound that can cause GI distress, and are highly susceptible to aflatoxin-producing mold.
Browse all dog-safe foods
DogDataHub covers 100+ foods with clear safety verdicts, serving sizes, and prep tips.
See all foods