Cause weakness, tremors, vomiting and overheating, even in fairly small amounts. The details below use the specific facts for this exposure, rather than treating it like every other food question.
1. Start with the exact exposure
For a closely related comparison, read Green Onions. Signs can appear after small quantities relative to body weight, usually within 12 hours.
2. Use the facts to decide whether to monitor or call
Another helpful reference is Onion Rings. A single nut from a large dog is often mild. Watch for wobbliness. More than a nut or two, or any signs of weakness/tremor.
3. If the details are uncertain
Follow the first 10 minutes guide. Contact your vet; signs usually pass in 24–48 hours but should be checked.
FAQ
How much Macadamia Nuts is dangerous?
Signs can appear after small quantities relative to body weight, usually within 12 hours.
Can I treat this at home?
A single nut from a large dog is often mild. Watch for wobbliness.
When should I call the vet?
More than a nut or two, or any signs of weakness/tremor.
Compiled from veterinary poison-control and medical reference sources, including the ASPCA Animal Poison Control Center, the Pet Poison Helpline, and the Merck Veterinary Manual. This is general educational information, not a diagnosis or a substitute for examination by your veterinarian. DogSafe's severity ratings are our own assessment, calculated from published guidance and your dog's weight. In an emergency, call ASPCA Animal Poison Control at 888-426-4435 or the Pet Poison Helpline at 855-764-7661.