Macadamia Nuts
Never feed macadamia nuts to dogs or cats. They are highly toxic and can cause poisoning, digestive disorders, and other serious complications.

Although the exact toxic compound in macadamia nuts is still not fully understood, it is widely accepted that they pose significant health risks and should always be avoided.
Because macadamia nuts are high in fat and calories, they can cause a variety of health issues in pets, including obesity, digestive disorders, pancreatitis, and heart disease. Excessive consumption may also lead to kidney problems.
Pancreatitis
Pancreatitis is an inflammation of the pancreas, an organ that produces digestive enzymes. When inflammation occurs, the enzymes may start attacking the pancreas itself, making the condition worse. Pancreatitis in dogs can be caused by an imbalanced diet, obesity, medication side effects, or ingestion of foreign substances.
Symptoms include:
- Vomiting
- Diarrhea
- Loss of appetite
- Bloating
If severe, pancreatitis can cause serious, life-threatening complications.
Heart Disease
Heart disease occurs when the heart’s function becomes impaired and can no longer circulate blood effectively. There are many possible causes, and symptoms may include breathing difficulties, loss of appetite, weight loss, or irregular heartbeat.
Prevention involves regular exercise, a balanced diet, weight control, and routine health check-ups.
Symptoms After Eating Macadamia Nuts
If a pet eats macadamia nuts, symptoms may appear within 12 hours and can last for 12 to 48 hours. Common symptoms include:
- Vomiting
- Diarrhea
- Indigestion
- Abdominal pain
- Tremors
- Weakness
- Lethargy
- Fatigue
- Unsteady walking
- Fever
What to Do If Your Pet Eats Macadamia Nuts
If your pet shows no symptoms after eating macadamia nuts, it’s best to let them rest at home and monitor their condition closely. However, if any of the symptoms above appear, visit a veterinarian immediately. Prompt medical care can help prevent the toxins from being absorbed into the bloodstream.
Depending on the severity of the symptoms, veterinarians may:
- Provide IV fluids to maintain hydration and stabilize digestion
- Administer medications to prevent vomiting or support digestion
- In severe cases, use drugs to break down fats and stabilize blood circulation
Summary
Even a small amount of macadamia nuts can be dangerous for pets. Always keep them out of reach, and seek veterinary care immediately if ingestion occurs. Early treatment is essential for a safe recovery.