✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last reviewed: 2026-04
Can dogs eat macadamia nuts?
The full picture
Macadamia nuts are one of a small number of foods that are uniquely toxic to dogs — cats and humans aren't affected, and the exact mechanism of action is still unknown despite decades of research. What's consistent is the clinical picture: weakness (particularly in the back legs), vomiting, muscle tremors, high temperature, and lethargy, typically appearing within 3–12 hours of eating the nuts. The threshold for clinical signs is roughly 2.4 grams per kg of body weight. Since a single macadamia nut weighs around 2 g, that means a 10 kg dog needs to eat just 10–12 nuts to show symptoms. The good news: macadamia toxicity is rarely fatal, and most dogs recover within 24–48 hours with supportive care. The bad news: chocolate-covered macadamias (common in confectionery) combine two separate toxins and can be significantly worse.
If your dog has already eaten macadamia nuts
- Call your vet if your dog has eaten any macadamia nuts — even a few can cause symptoms in small dogs
- If your vet is closed, call the Animal PoisonLine on 01202 509000
- If the nuts were chocolate-covered, this is more serious — tell the vet about both components
- Do NOT induce vomiting yourself unless your vet specifically tells you to
- Note: most dogs recover fully within 48 hours with supportive care, but treatment decisions depend on the dose
Information to have ready when you call:
- Approximate number of nuts eaten
- Whether nuts were plain or coated (chocolate, yoghurt, honey-roast)
- Time of ingestion
- Your dog's weight
- Any symptoms appearing yet
- Whether any other toxic foods were eaten at the same time
Risks to watch for
- Hind leg weakness or inability to stand (classic sign)
- Vomiting, often within 6 hours
- Muscle tremors
- Raised body temperature (up to 40.5°C)
- Depression and lethargy
- Pancreatitis from high fat content (uncommon but possible)
- Compounded toxicity if paired with chocolate or raisins
What to watch for — and when
[{'when': 'Within 3–6 hours', 'signs': 'Vomiting, lethargy, raised temperature'}, {'when': '6–12 hours', 'signs': 'Hind leg weakness, wobbling, tremors, joint stiffness'}, {'when': '12–24 hours', 'signs': 'Peak symptoms — some dogs unable to stand on back legs'}, {'when': '24–48 hours', 'signs': 'Gradual recovery; most dogs back to normal within 48 hours with supportive care'}]
Hidden sources to check
- Trail mix, cookies, and baked goods
- Chocolate-covered macadamias — double trouble with theobromine
- Premium ice creams and desserts
- Nut butters and nut spreads (check labels)
- Some muesli and granola mixes
- Tropical-style gift hampers
- Thai and Hawaiian-influenced cooking
Breed-specific notes
- Small dogs: hit the 2.4 g/kg threshold on just 3–5 nuts.
- Breeds prone to pancreatitis (miniature schnauzer, Yorkie, cocker spaniel) have extra risk from the high fat content.
- Flat-faced breeds: never induce vomiting at home.
Safe portion size
None — macadamias are one of the few foods that are specifically toxic to dogs.
Safer alternatives
- Plain unsalted peanuts (xylitol-free)
- Blueberries
- Small carrot pieces
Have a cat in the household too? Check what cats can eat — nut toxicity varies between species.
Common questions
Will my dog die from macadamia nuts?
How many macadamias are dangerous?
My dog ate macadamias but seems fine — am I in the clear?
What about other tree nuts — almonds, cashews, pistachios?
Why don't humans or cats get this?
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