Are berries from a madrona tree poisoneous to dogs?

Yes, the berries from a madrona tree (Arbutus menziesii) are considered toxic to dogs. While ingestion may not always result in severe symptoms, it can cause gastrointestinal upset, including vomiting and diarrhea. It's best to keep dogs away from madrona trees and their berries to avoid potential health risks. If a dog consumes them, it's advisable to consult a veterinarian.