What are the symptoms if a cat eats Macadamia nuts?

While the specific mysterious toxin in macadamia nuts is most widely documented to cause severe clinical signs in dogs, Vomiting and Diarrhea, Abdominal Pain and Loss of Appetite, Pancreatitis, Lethargy, Weakness, and Tremors, Hyperthermia (Fever), Difficulty Breathing (Choking/Obstruction)

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✕ Toxic

Macadamia nuts

Q: Is Macadamia nuts toxic to cats?

Warning: Toxic. Macadamia nuts are toxic to cats, although scientists are still trying to figure out exactly which chemical causes the reaction. Even a small amount can make a cat sick, and the high fat content in these nuts can also cause a painful stomach condition called pancreatitis. When a cat eats macadamia nuts, they often develop a specific set of symptoms within 12 hours. The most common signs are weakness (especially in the back legs), shaking or tremors, vomiting, and a high fever. Because many macadamia products like cookies also contain chocolate or raisins, the danger can be even higher. Because the exact cause of the poisoning is still a mystery, it is best to keep all macadamia nuts and products containing them far away from your pets. If your cat eats any amount of these nuts, please contact a veterinarian and monitor them closely for any signs of weakness or shaking.

Macadamia nuts are toxic to cats, although scientists are still trying to figure out exactly which chemical causes the reaction. Even a small amount can make a cat sick, and the high fat content in these nuts can also cause a painful stomach condition called pancreatitis. When a cat eats macadamia nuts, they often develop a specific set of symptoms within 12 hours. The most common signs are weakness (especially in the back legs), shaking or tremors, vomiting, and a high fever. Because many macadamia products like cookies also contain chocolate or raisins, the danger can be even higher. Because the exact cause of the poisoning is still a mystery, it is best to keep all macadamia nuts and products containing them far away from your pets. If your cat eats any amount of these nuts, please contact a veterinarian and monitor them closely for any signs of weakness or shaking.

Important Notes

Toxic compounds: unidentified; mechanism under investigation

Mechanism: unknown; hypothesised to involve disruption of fatty acid metabolism or mitochondrial function

Symptoms: weakness, hind limb tremors, vomiting, elevated body temperature (hyperthermia), lethargy; onset within 12 hours

Macadamia-containing products — cookies, trail mix, chocolate-covered nuts — carry additional risks from chocolate or xylitol

Contact your vet if your cat ingests macadamia nuts; monitor for tremor or weakness

Potentially Toxic Parts

Stem

Possible Symptoms Reported in Cats

Difficulty Breathing (Choking/Obstruction)

Respiratory · Immediate (during ingestion).

Pancreatitis

Gastrointestinal · Delayed (typically develops 24 to 72 hours after ingesting a high-fat load).

While the specific mysterious toxin in macadamia nuts is most widely documented to cause severe clinical signs in dogs

Metabolic

Vomiting and Diarrhea

Gastrointestinal · Usually within 12 hours of ingestion.

Abdominal Pain and Loss of Appetite

Gastrointestinal · Within 12 hours.

Lethargy, Weakness, and Tremors

Gastrointestinal · Within 12 hours.

Hyperthermia (Fever)

Neurological · Within 12 hours.

Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.