Is Macadamia Nuts Toxic to Cats and Dogs?
Macadamia nuts are moderately toxic to dogs, causing weakness and tremors; they are mildly toxic to cats. Call a vet, especially with weakness.
Can cause real harm — call a vet for guidance.
Usually minor, but watch for symptoms.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Macadamia Nuts?
Macadamia nuts are moderately toxic to dogs, causing weakness and tremors; they are mildly toxic to cats. Call a vet, especially with weakness.
Also known as: macadamia, macadamia nut, hawaii nut.
Symptoms to Watch For
🐕 In Dogs
- Weakness, especially in the hind legs
- Depression and lethargy
- Vomiting and tremors
- Fever in some dogs
🐈 In Cats
- Possible stomach upset (cats are less studied)
- Vomiting or lethargy
What to Do If Ingested
- Note how many nuts were eaten and when.
- Call a veterinarian or poison hotline for guidance.
- Watch for weakness or tremors over the next 12 hours.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- A large amount was eaten
- Hind-leg weakness or inability to stand
- Vomiting, tremors, or fever
- Symptoms worsen over several hours
Frequently Asked Questions
Frequently Asked Questions
Why do macadamia nuts affect dogs specifically?
The exact toxin is not fully identified, but dogs are uniquely sensitive to macadamia nuts. The hallmark sign is weakness in the hind legs, often with tremors and fever. Most dogs recover with supportive care, but a vet should guide treatment.
Are macadamia nuts dangerous to cats?
Cats are less studied and appear less sensitive than dogs, but macadamia nuts can still cause stomach upset. Keep them away from all pets and call a vet if a cat eats a large amount.
How long after eating macadamia nuts do symptoms appear?
Signs usually appear within 12 hours and can last a day or two. Watch for hind-leg weakness, lethargy, vomiting, and tremors, and call a vet for guidance.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11