Macadamia Nut Toxicity in Dogs
Macadamia nuts are often found in baked goods, snack mixes, and trail bars. While they’re a nutritious treat for humans, macadamia nuts are toxic to dogs and potentially harmful to other pets. Even a small amount can cause serious symptoms in dogs—and the exact cause of toxicity remains unknown.
Macadamia nuts can be toxic to dogs!
Why Macadamia Nuts Are Dangerous
The exact toxin responsible hasn’t been identified, but ingestion can lead to neurological and gastrointestinal symptoms in dogs. While fatalities are rare, the signs can be severe.
Common Sources of Exposure:
Macadamia nuts (raw or roasted)
Cookies, brownies, and baked goods
Trail mixes and granola bars
Nut butters or spreads containing macadamias
Symptoms of Macadamia Nut Toxicity in Dogs
Signs usually appear within 6–12 hours of ingestion and may include:
Weakness, especially in the hind legs
Vomiting
Lethargy or depression
Tremors or shaking
Elevated body temperature
Stiffness or difficulty walking
Pale gums (in more serious cases)
Severity Based on Amount Ingested
Mild exposure (1–2 nuts): May cause mild vomiting or weakness in a large dog
Moderate exposure (4–7 nuts): Likely to cause hind limb weakness, tremors, vomiting, and lethargy
Severe exposure (large quantity or small dog): Can result in collapse, shaking, or more pronounced neurologic signs.
What to Do If Your Pet Is Exposed
Call Animal Poison Control Immediately. Do not wait for symptoms to present. Early intervention can prevent symptom development. ASPCA Animal Poison Control: 888-426-4435
Do not induce vomiting unless directed. Some pets may be at risk for aspiration if already weak.
Save the packaging or list ingredients. Knowing the number of nuts and size of your pet helps estimate risk.
Treatment
Veterinary care may not be needed, depending on the exposure. However, if needed, veterinary care may include:
Inducing vomiting (if early and safe)
Activated charcoal to prevent further absorption
IV fluids to support hydration and recovery
Pain relievers or medications for muscle tremors
Temperature support and monitoring
Prognosis
Most dogs recover fully within 24–48 hours with supportive care. However, symptoms can be dramatic and stressful, especially in small or sensitive pets.
Are Cats Affected?
Macadamia nut toxicity is well-documented in dogs, but not in cats. However, since cats often have different (and unpredictable) reactions to human foods, it’s best to keep all nuts out of their reach as well.
Prevention Tips
Avoid feeding pets any food containing nuts
Store nut mixes, baked goods, and spreads out of reach
Remind children and guests not to share snacks
Watch for hidden macadamias in holiday treats
Final Thought
Macadamia nut ingestion can look serious, but most pets recover quickly with the right care. When in doubt, don’t wait—call poison control. Quick action makes all the difference.
