Can Dogs Eat Green Tea?

Green tea contains caffeine in a similar way to black tea and coffee, though usually at a somewhat lower concentration per cup when brewed normally, which means a small lick from an abandoned mug is unlikely to be a major concern for most dogs. The picture changes considerably if a dog gets into dry tea leaves, a box of tea bags, or particularly a concentrated green tea extract supplement, since all of these deliver a much more concentrated caffeine dose than a diluted cup. Green tea extract capsules, sometimes used by people for their antioxidant content, are worth specific caution since a dog swallowing several capsules can end up with a genuinely dangerous caffeine load. As with other caffeine sources, watch for restlessness, a racing heart, and tremors, and treat any concentrated-source exposure as more urgent than a sip of brewed tea.