Studly presented with a history of decreased appetite, shaking, blood in the stool and falling over. On exam Studly was found to be very weak, hypothermic (low body temperature) and was shaking. Bloodwork revealed the following: azotemia (elevated kidney enzyme), hypoglycemia (low blood sugar), hyperkalemia (high potassium) and hyponatremia (low sodium). The differential diagnoses at this point were: kidney failure and Addison's disease. Treatment was started while further diagnostic testing was performed. Studly was treated with IV fluids, IV dextrose (sugar), IV steroids and antibiotics. Studly responded well to the treatment and by the end of the day was almost back to normal. The following day the lab results came back and confirmed that Studly had Addison's disease. Addision's disease is a disease of the adrenal glands. Normally the adrenal glands produce several hormones that are involved in regulating the body's metabolism. With Addision's disease these hormones are decreased or absent. Addison's disease can have a wide variety of symptoms. In mild cases the dog may have intermittent vomiting, diarrhea and decreased appetite. Severe cases, like Studly can be life threatening. Treatment involves replacing the absent hormones with monthly injections and oral medications.