Why
Macadamia nuts cause weakness, wobbliness, vomiting, tremors and overheating. Signs usually appear within 12 hours and can last a day or more.
What to do instead
- Keep them, and cookies or trail mix containing them, out of reach.
Warning signs
- Call a vet or poison line if your dog eats any.
If your dog ate macadamia nuts
- Note how much your dog ate and when, and keep any packaging.
- Call your vet, an emergency clinic, ASPCA Animal Poison Control ((888) 426-4435) or the Pet Poison Helpline (855-764-7661).
- Don't make your dog vomit unless a vet tells you to.
Other nuts and nut butters: quick answers
| Food | Verdict | Short answer |
|---|---|---|
| Almonds | Avoid | No. Almonds can block the esophagus and are high in fat. |
| Pistachios | Avoid | Best avoided. Pistachios are not toxic, but they are fatty, salty and a choking risk. |
| Cashews | Small amounts | Yes, a few plain unsalted cashews. They are fatty, so keep it rare. |
| Peanut butter | Small amounts | Yes, plain and xylitol-free, in small amounts. |
| Peanuts | Small amounts | Yes, a few plain unsalted peanuts. |
Rules for any new food
- Plain is the rule: no salt, butter, oil, onion, garlic, sugar or sweeteners. Most of the danger in human food comes from what is added to it.
- Keep all treats under 10% of your dog's daily calories (WSAVA). The rest should come from a complete dog food.
- Check labels for xylitol, raisins, chocolate and macadamia nuts, which turn up in baked goods, snacks and spreads.
- If your dog has a health condition, such as diabetes, pancreatitis or kidney disease, ask your vet before adding any new food.
Frequently asked questions
Are macadamia nuts safe for dogs?
No. Macadamia nuts are one of the most poisonous foods for dogs.
What should I do if my dog ate macadamia nuts?
Call your vet, an emergency clinic, or ASPCA Animal Poison Control at (888) 426-4435 right away. Note how much your dog ate and when.
Sources
- American Kennel Club, "Human Foods Dogs Can and Can't Eat" (updated Aug 17, 2026)
- ASPCA Animal Poison Control, "People Foods to Avoid Feeding Your Pets"
Checked October 17, 2026. We are a reference, not a vet: if in doubt, call yours. How we check.