TL;DR: Macadamia nut ingestion can cause alarming hind-limb weakness and tremors in dogs, but with prompt veterinary guidance, the prognosis is generally excellent.
What is macadamia nut toxicity and how does it affect my dog?
Macadamia nuts are uniquely toxic to dogs, though the specific toxin remains unknown. Ingestion often leads to a condition characterized by profound weakness, particularly in the hind limbs. This can be very frightening for owners, as your pet may suddenly appear unable to stand or walk properly after consuming the nuts.
Is it an emergency if my dog eats macadamia nuts?
- The urgency level for macadamia nut ingestion is Medium; while symptoms are dramatic, the prognosis is usually excellent.
- Symptoms often include tremors, vomiting, and fever, which require veterinary assessment.
- Contact your veterinarian immediately to determine if your dog requires supportive fluids or medication based on their specific reaction or health history.
How can sharing photos or videos help the veterinarian triage my dog?
- A photo of the product packaging helps your vet identify other potential toxins, such as chocolate or xylitol.
- A short video of your dog’s movement allows the medical team to assess the severity of neurological symptoms.
- These visuals help the clinical team determine how quickly your dog needs to be seen for treatment.
Clinical Context (Merck Veterinary Manual)
Ingestion of macadamia nuts in dogs can result in a nonfatal syndrome characterized by weakness, depression, vomiting, ataxia, tremors, and hyperthermia, typically appearing within 12 hours of ingestion. Tremors may be secondary to muscle weakness. Diagnosis is based on a history of exposure and clinical signs. Initial triage should include emesis induction with apomorphine or hydrogen peroxide (or gastric lavage if sedated due to seizures), followed by activated charcoal administration (1-4 g/kg, PO) every 12 hours for symptomatic animals, to address enterohepatic recirculation. Supportive care involves thermoregulation, correction of acid-base and electrolyte abnormalities, electrocardiographic monitoring, and urinary catheter placement. Signs generally resolve within 12-48 hours, though clinical signs may persist up to 72 hours in severe cases.
Chapter: Toxicology
Source: The Merck Veterinary Manual, 11th Edition (Page 2967)