8. Caffeine
If chocolate is bad, caffeine is worse. Coffee, tea, energy drinks, diet pills — all dangerous. Caffeine and theobromine are cousins, and they affect dogs the same way: racing heart, restlessness, tremors, sometimes seizures.
A few sips of coffee can seriously harm a small dog. Used coffee grounds in the trash are also a hazard — some dogs love digging through the bin. Tea bags too. Keep mugs off low tables. Dispose of grounds in a sealed container. Never share a sip as a “treat.” The next one is the strangest entry on this list.