Can dogs eat macadamia nuts?
Toxic — do not feedNo — macadamia nuts are toxic to dogs. Even a small number can cause weakness, tremors, and a high fever.
Reviewed by the Webvet Veterinarian Team · Last reviewed June 26, 2026
No. Macadamia nuts are toxic to dogs, and they are one of the very few nuts that are genuinely poisonous rather than simply fatty or hard to digest. Even a small number of nuts can make a dog sick, and because macadamias so often turn up inside cookies, brownies, and trail mix that also contain chocolate, a single stolen treat can carry two poisons at once. If your dog has eaten macadamia nuts, treat it as urgent and call your veterinarian or an animal poison control line right away.
- 1Macadamia nuts are toxic to dogs even in small amounts. There is no safe serving size.
- 2Signs often appear within 12 hours: weakness in the hind legs, wobbliness, vomiting, tremors, and a raised body temperature.
- 3Macadamias are frequently baked into chocolate cookies and brownies, so a poisoned dog may be facing two toxins at once.
- 4Most dogs recover within 24 to 48 hours with prompt veterinary care and deaths are rare, but this is still an emergency.
Treats should stay under 10% of your dog's daily calories. JustFoodForDogs makes the rest of it.
- Recipes developed by veterinary nutritionists
- Whole-food ingredients you can recognise
- Fresh meals delivered to your door
Webvet may earn a commission when you click through to JustFoodForDogs, at no extra cost to you.
Why are macadamia nuts toxic to dogs?
Macadamia nuts hold a strange place on the list of foods dangerous to dogs. Most nuts are a problem only because they are high in fat or a choking hazard. Macadamias are different: they cause a specific, well-documented poisoning syndrome. Veterinarians and toxicologists have described the same pattern across many cases, yet the exact toxin responsible has never been identified. What is clear from the ASPCA, VCA Animal Hospitals, and the Merck Veterinary Manual is that dogs are uniquely sensitive to it, and that it takes very little to cause trouble.
Because the mechanism is not fully understood, there is no antidote. Treatment supports the dog through the reaction rather than reversing it directly. The reassuring news is that the syndrome is usually self-limiting, so a dog that gets prompt care almost always comes through it. There is also a second, more general concern: macadamias are extremely high in fat, and a large, oily load can trigger pancreatitis, a painful inflammation of the pancreas. Whole nuts can also cause choking or an intestinal blockage, especially in small dogs.
The hidden chocolate danger
One of the biggest real-world risks with macadamia nuts is not the nut on its own but the company it keeps. Macadamias are a popular baking ingredient, and they show up constantly in white-chocolate and dark-chocolate cookies, brownies, biscotti, and holiday treats. A dog that raids a plate of cookies can swallow macadamia nuts and chocolate in the same mouthful, stacking two separate toxins. Chocolate carries its own dangers, and dark chocolate is especially serious. When you call your vet, describe everything the dog may have eaten, not just the nuts, because the chocolate, raisins, or the sweetener xylitol hiding in a baked good can each be more dangerous than the macadamias themselves.
Soft, pea-sized training treats small enough to reward often while keeping treats inside the 10% of daily calories vets recommend.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
Symptoms of macadamia nut poisoning
The signs of macadamia nut poisoning are distinctive, and the hind legs are usually where owners notice something first. Affected dogs often become weak in the back legs, sometimes to the point that they struggle to stand or walk and look wobbly, drunk, or partially paralyzed. That hind-leg weakness, paired with a raised body temperature, is the classic fingerprint of macadamia toxicity. Common signs include:
- Weakness, especially in the hind legs, sometimes to the point of being unable to stand or walk
- Wobbliness, stumbling, or an unsteady, drunken gait
- Vomiting and lethargy
- Muscle tremors
- Hyperthermia, meaning a raised body temperature or fever
- Joint stiffness or apparent pain
Signs tend to follow a predictable timeline, which helps you know what to expect and when to act.
| Time after eating | What you may see |
|---|---|
| Within 12 hours | Onset of signs: hind-leg weakness, wobbliness, vomiting, tremors, and a raised body temperature |
| 12 to 24 hours | Signs often peak; the dog may be unable to walk normally, run a fever, and appear miserable |
| 24 to 48 hours | Most dogs steadily improve and return to normal with supportive care |
How much is too much?
There is no established safe amount. Reports describe dogs showing signs after eating even a small number of nuts, and those signs can appear within 12 hours. Smaller dogs are at greater risk simply because it takes fewer nuts to reach a harmful dose for their body weight, but no size of dog is immune. Do not try to calculate a safe quantity at home or wait to see whether your dog crosses some threshold. Because the toxin is unknown and individual dogs vary, the safest assumption is that any amount can cause a reaction, and any known ingestion is worth a phone call.
Dehydrated sweet potato with one ingredient. All the chew, none of the butter, salt, or seasoning.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
What to do if your dog ate macadamia nuts
- Take the nuts away and check how much is gone. Note roughly how many nuts, whether they were plain or baked into something, and what time it happened.
- Look for chocolate and other hidden ingredients. If the nuts came from a cookie, brownie, or trail mix, your dog may also have eaten chocolate, raisins, or xylitol. Save any packaging.
- Call for help right away. Contact your veterinarian, or call the Pet Poison Helpline at 855-764-7661 or the ASPCA Animal Poison Control Center at 888-426-4435. Both are available 24 hours a day.
- Do not induce vomiting on your own unless a veterinarian or poison expert tells you to. The wrong approach can do more harm than good.
- Watch closely for warning signs. Hind-leg weakness, tremors, vomiting, and a hot, panting dog all mean you should be heading to the clinic.
- Get to a vet if any signs appear or if a large amount was eaten. Early supportive care makes for a faster, smoother recovery.
Veterinary treatment and prognosis
There is no specific antidote for macadamia nut poisoning, so veterinary care centers on decontamination and support. If the nuts were eaten very recently, your vet may induce vomiting or give activated charcoal to limit how much toxin is absorbed. From there the care is supportive: monitoring and controlling body temperature, managing pain and tremors, and giving intravenous fluids to keep the dog hydrated and comfortable while the reaction runs its course. Dogs that ate a large, fatty amount are also watched for signs of pancreatitis.
The prognosis is genuinely reassuring. Most dogs that receive appropriate care make a full recovery within 24 to 48 hours, and deaths from macadamia nuts alone are rare. Even so, the symptoms can look frightening, and a dog that cannot stand or is running a fever needs veterinary attention rather than watchful waiting at home.
Safe treats to give instead
If you want to share a snack with your dog, skip the nut bowl and reach for something known to be safe. Plenty of everyday fruits and vegetables make excellent, low-risk treats in small amounts. Dogs can safely enjoy blueberries, crunchy carrots, slices of apple without the core or seeds, a little banana, and plain pumpkin. These give you the bonding moment of a shared snack without the emergency that a handful of macadamias can bring.
Since this one is off the menu, here is a treat you can hand over without a second thought. One ingredient, nothing else.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
Frequently asked questions
Frequently Asked Questions
Will one macadamia nut hurt a dog?
A single macadamia nut is unlikely to be fatal to a healthy dog, but it can still trigger poisoning, especially in a small dog, and no amount is proven safe. Because signs can appear within 12 hours and the toxin is unknown, the right move after any macadamia ingestion is to call your vet or a poison control line for advice rather than assume one nut is harmless.
What are the most toxic nuts for dogs?
Macadamia nuts are the most clearly toxic nut for dogs, causing a specific poisoning syndrome. Black walnuts and any moldy nuts are also dangerous. Most other nuts, including almonds, pecans, and cashews, are risky mainly because of their high fat and salt and their choking or obstruction potential rather than a specific toxin.
Can dogs have cashews and macadamia nuts?
No to macadamia nuts, which are toxic. Plain, unsalted cashews are not poisonous and a small piece is usually tolerated, but they are very high in fat and best kept to a rare treat. Never give your dog mixed nuts, because the blend often hides macadamias and other risky varieties.
What should I do if my dog ate a nut?
Identify the nut and roughly how much was eaten, then check for chocolate, raisins, or xylitol if it came from a baked good. Call your veterinarian or a poison control line right away, and do not induce vomiting unless a professional directs you to. Watch for weakness, vomiting, tremors, or fever and get to a clinic if any appear.
How long do macadamia nut poisoning symptoms last in dogs?
Signs usually begin within 12 hours of eating the nuts, and most dogs recover within 24 to 48 hours with supportive veterinary care. Dogs that develop pancreatitis from the fatty load can take longer and have a more variable outlook, which is why a vet check is worthwhile even when the poisoning itself looks mild.
What is the most toxic thing a dog can eat?
Among common household foods, chocolate, xylitol, grapes and raisins, onions and garlic, and macadamia nuts are among the most dangerous. Xylitol and dark chocolate are especially serious, and because macadamias are so often baked into chocolate treats, one stolen cookie can combine several of these hazards at once.
Sources
Reviewed by the Webvet Veterinarian Team
General guidance based on credible veterinary sources — not a diagnosis or a substitute for your veterinarian. If your pet ate something toxic or is unwell, contact your vet or a pet poison line right away.