Guinea pigs should not eat cinnamon because it is a moderate irritant and can pose an aspiration risk when powdered, causing choking or coughing. It is best to avoid feeding guinea pigs cinnamon to prevent any potential respiratory issues.
Guinea pigs should not eat Rhododendron or any related plants such as Laurels, Rose Bay, or Azalea because they contain grayanotoxin, a neurotoxin which