Coffee, tea, and other caffeine

Caffeine is naturally present in coffee, tea, chocolate, and the South American plant guarana. It is also often found in soft drinks and pharmaceuticals. This drink has been shown to increase heart rate and activate the neurological system in dogs. Dogs may develop restlessness, increased thirst, loss of bladder control, vomiting, and diarrhea within 2-4 hours after taking caffeine.

Caffeine overdose in dogs can result in irregular cardiac rhythms or lung failure, which can lead to death. It is rapidly absorbed by a dog's system, resulting in moderate effects at 9 mg per pound (20 mg per kg) of the dog's weight and convulsions at 27 mg per pound (60 mg per kg) and higher. One standard cup of brewed coffee has roughly 95 milligrams of caffeine. Several incidents of mortality in dogs have been documented as a result of caffeine overdose.