Mysterious Max

Max, a 6-year-old, neutered male Boston terrier, was presented to your clinic for weakness and ataxia. His appetite was decreased and he had vomited several times in the past 4 days. Although he had eaten a small amount of food the past 2 mornings, he had vomited the food shortly afterward. The owner had not seen him defecate in 2 to 3 days.

On physical examination, Max was bright, alert, and responsive but weak. T = 100.5, P = 168, R = 60. He had pale pink mucous membranes, and hydration was assessed as normal. Peripheral lymph nodes were normal size and texture. Auscultation of the heart and lungs revealed no abnormalities. Abdominal palpation was unremarkable other than moderate hepatomegaly. A complete neurologic exam was unremarkable. Max is overweight and has symmetric alopecia, especially of the caudal thighs and hocks. There is hyperpigmentation of the ventral abdomen and inguinal area. He is also receiving Temaril–P^® for suspected atopic dermatitis. 

Review and interpret the blood and urinalysis results below, then proceed to the case challenge.