A 13-year-old castrated male domestic shorthair cat was evaluated by a referring veterinarian because of progressive hair loss, anorexia, diarrhea, and profound weakness that developed over a period of a few weeks. The cat was referred to the Veterinary Medical Teaching Hospital at the University of Missouri for further assessment.
On initial evaluation, the cat's mentation was obtunded and mild dehydration was evident. Severe alopecia was present on the ventral aspects of the abdomen and neck, axillae, medial aspects of the forelimbs and hind limbs, periocular region, and nasal planum (
