Can dogs eat macadamia nuts?
Short answer
No, macadamia nuts are toxic to dogs. As little as 6 nuts for a 22 lb dog can cause weakness, tremors, and fever, so your dog should never get even one.
Macadamia nuts are on the dangerous list for dogs — they cause hind-leg weakness, tremors, and fever. Here's what's behind the toxicity, what doses are risky, and what to do if your dog gets into some.
Why not
Toxic compound: unknown toxin (mechanism not fully understood).
Macadamia nuts contain a substance that's toxic to dogs, but scientists haven't fully identified exactly what it is or how it works in the body. Poisoning typically shows up within 12 hours of ingestion and mainly affects the nervous system and muscles.
The toxic dose is relatively low — clinical signs have been reported starting at around 2.4 grams of nuts per kilogram of body weight (roughly 1 gram per pound), which works out to about 6 to 10 nuts for a 22 lb dog. Poisoning usually isn't fatal, but it's very unpleasant for the dog and needs veterinary attention.
The risk goes up when macadamia nuts show up in baked goods alongside chocolate, since that combination multiplies the toxicity. On top of that, these are hard, high-fat nuts, which can cause digestive upset or pancreatitis in dogs on their own, regardless of the specific toxin involved.
No toxicity has been documented in cats or other animal species — this appears to be a dog-specific problem, which suggests the mechanism is tied to how dogs metabolize the nuts.
Rough portion
No amount of macadamia nuts is safe for a dog; symptoms have been reported starting at around 2.4 g per kg (about 1 g per lb, or roughly 6-10 nuts for a 22 lb dog).
Risks
- Weakness and tremors in the hind legs, and in severe cases inability to stand.
- Fever and elevated heart rate within the first 12 hours after ingestion.
- Digestive upset and risk of pancreatitis due to the high fat content of the nuts.
- Increased risk when combined with chocolate or sugar in baked goods and sweets.
Symptoms to watch for
- Hind-leg weakness
- Tremors
- Fever
- Vomiting
- Loss of coordination, wobbly walk
- Painful or swollen joints
- Elevated heart rate
Your dog already ate macadamia nuts. What now?
- Contact your vet or an emergency vet clinic even if no symptoms have shown up yet — they usually appear within 12 hours.
- Figure out how many nuts your dog ate and whether they were part of a baked good containing chocolate or sugar.
- Don't try to induce vomiting without talking to a vet first.
- Be prepared to monitor your dog at home or at the clinic — most cases respond to supportive care and resolve within 24 to 48 hours.
Common questions about dogs and macadamia nuts
How many macadamia nuts are dangerous for a dog?
Clinical signs have been reported starting at around 2.4 grams of nuts per kilogram of body weight, or about 1 gram per pound. For a 22 lb dog, that's roughly 6 to 10 nuts, and larger dogs would need proportionally more, but there's no truly safe amount — even a small dose can trigger unpleasant symptoms.
Is macadamia nut poisoning fatal in dogs?
Based on available data, it's usually not fatal, and symptoms typically resolve within 24 to 48 hours with supportive care. Still, it's a condition that requires veterinary supervision, since the dog can be quite weak, run a fever, and may be unable to stand.
What if my dog ate a cookie with macadamia nuts and chocolate?
That's two toxic substances at once, so you need to contact your vet immediately. The risk and severity of symptoms increase, since chocolate also contains theobromine, which is toxic to the heart and nervous system.
Can dogs eat other kinds of nuts safely?
Some nuts, like plain unsalted peanuts, are fine for dogs in small amounts, but macadamia nuts are a clear exception and are off the table entirely. It's always safer to offer a piece of fruit or vegetable as a treat instead of any nut.
Safer alternatives
Can dogs eat apples?
Yes, dogs can eat apples. The flesh is safe, full of fiber and vitamin C, and even gives teeth a light mechanical clean. Always remove the core and seeds, though, and don't feed large pieces at once.
Can dogs eat blueberries?
Yes, blueberries are one of the healthiest fruits for dogs. They're small, low in calories, and packed with antioxidants, which is why they're often recommended as a training treat or a snack for older dogs.
Can dogs eat carrots?
Yes, carrots are safe for dogs and rank among the best treats you can give them. They're low in calories, full of fiber and beta-carotene, and raw carrots even help clean teeth. Cut them to a size that suits your dog.
Can dogs eat peanuts?
Yes, raw or roasted unsalted peanuts without the shell are fine for dogs in small amounts. Shells, salted peanuts, and flavored varieties aren't recommended because of the risk of a blocked gut and too much sodium.
More from nuts and seeds
Can dogs eat almonds?
No, almonds aren't recommended for dogs. They're not toxic the way macadamia nuts are, but dogs digest them poorly, a whole nut poses a choking risk, and the high fat content can trigger pancreatitis.
Can dogs eat cashews?
Yes, dogs can eat cashews, but only raw, unsalted ones and in small amounts. Cashews are high in fat, so larger portions can cause digestive upset or contribute to pancreatitis.
Can dogs eat coconut?
Yes, a small piece of fresh coconut flesh with the shell removed usually won't hurt a dog. Because of the high fat content and the risk of injury from the hard shell, though, coconut should stay an occasional treat.
Sources
- ASPCA Animal Poison Control: People foods to avoid feeding your pets
- Merck Veterinary Manual: Food Hazards in Dogs and Cats
- Pet Poison Helpline: Macadamia Nuts
Last updated 10 September 2026.