Some of the symptoms include central nervous system issues as well as enhanced heart rate. (usbones.com)
In untreated dogs or dogs with more severe cases, the pup may cease all food intake, develop a discharge from the eyes, and appear to experience seizures or other central nervous system issues. (professorshouse.com)
People suffering from high blood pressure, CV disease or nervous system issues should consult their doctor before supplementing with caffeine. (fitnessandpower.com)