6. Caffeine
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Caffeine affects dogs much like it does humans but at a much more dangerous level. Found in coffee, tea, sodas, and energy drinks, caffeine stimulates the nervous system and heart, leading to restlessness, rapid breathing, tremors, and seizures.
What to Do: If your dog accidentally drinks coffee or eats caffeine-containing food, take them to the vet as soon as possible. There is no antidote, so treatment focuses on managing symptoms.