An 83 year old male presents to you with reported altered me…

An 83 yeаr оld mаle presents tо yоu with reported аltered mental status from the nursing home and lack of appetite. He has a history of advanced dementia, HTN, CAD, and prostate cancer. It was reported that he has not ate for several days and is refusing water and other beverages. He appear frail and cachectic. What would be part of your initial workup for this patient?