Can dogs eat cinnamon?

Only with precautions. Cinnamon is not toxic to dogs the way nutmeg is, but large amounts irritate the mouth and lungs, and cinnamon oil is far stronger than powder. The bigger real-world risk is baked goods that pair cinnamon with nutmeg, raisins or xylitol. A lick of cinnamon toast is tolerable; keep sticks and powder stored away.

Watch for mouth irritation, coughing if inhaled, vomiting in quantity. Symptoms may appear within hours; when in doubt, call your vet.

Assess how much was eaten and whether seeds, pits, shells or seasoning were included. Small plain amounts usually need monitoring only; large or seasoned amounts warrant a call to your vet.