If you have any reason to suspect your pet has ingested something toxic, please contact your veterinarian or one of the other resources listed:
ASPCA Animal Poison Control Center 24-hour hotline at (888) 426-4435
• Pet Poison Helpline® 24-hour animal poison control service at (855) 764-7661

Macadamia Nuts

Whether processed or fresh, macadamia nuts can cause problems for your pet. Dogs are the only species in which toxicity has been reported.

macadamia nuts

Signs and symptoms of toxicity: weakness, depression, vomiting, lack of muscle control, tremors, joint pain, difficulty walking, hind limb weakness, elevated body temperature, and mild abdominal pain. These signs usually occur within 12 hours of ingestion.

Toxic Consumption: Typically clinical signs of toxicity are seen at > 2 g/kg (0.8 g/lb) . However, as little as 0.7 g/kg (0.3 g/lb) may cause signs of toxicosis.

For all considerations below, an approximation of 12 nuts in 1 ounce of macadamia nuts was used.

Dogs: Macadamia Nut Toxic Consumption
Yorkie, Chihuahua
Pug, Boston Terrier, Poodle
Beagle, Scottish Terrier
Boxer, Cocker Spaniel
Retriever, German Shepherd
Great Dane, St. Bernard
1 – 10 lbs.
(0.45 – 4.6 kg)
11 – 25 lbs.
(5 – 11.4 kg)
26 – 40 lbs.
(11.8 – 18.2 kg)
41 – 70 lbs.
(18.6 – 31.8 kg)
71 – 90 lbs.
(32.3 – 40.9 kg)
91 – 110 lbs.
(41.4 – 50 kg)
dog1 dog2 dog3 dog4 dog7 dog6
> 0.1 nuts > 1 nut > 3 nuts > 5 nuts > 9 nuts > 12 nuts

– Osweiler, G, et al. (2011). Blackwell’s five-minute veterinary consult clinical companion. Small Animal Toxicology. [Kindle version]. Retrieved from Amazon.com
– The Merck Veterinary Manual. Macadamia Nuts. Available at: http://www.merckmanuals.com/vet/toxicology/food_hazards/macadamia_nuts.html. Accessed August 31, 2014.

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