Drogo showed no interest in morning meal and displayed lethargy. His energy picked up when presented with a new environment: car trip to the vet. He remained insistently vocal in his cat carrier while riding to vet.

Advised vet, Dr Cowser @ Sandy Lake VCA Animal Hospital that Drogo had not eaten, drank, played for nearly 48 hours. No litter box visits observed during the same timeframe.

Dr Cowser observed:
Cloudiness in the ocular region
Pupils were not contracting to bright light
Bloat and tenderness in abdominal region
Discharge in eyes
Surmised some muscle loss due to slight weight loss since last visit
Blood serum presented as yellow/amber color
Temperature taken 2x, first time was normal, second time @ 102F indicating fever

Indication of inflammation. Differential diagnosis of FIP, wanted to conduct a full blood panel Chem (8) CBC to get more information. Prescribed Prednisolone 3mg 1.5mL 2x daily for first 7 days, then once daily afterwards.

Asked about where we got Drogo -> Irving Animal Shelter
Seemed interested that we had his brother -> littermate Conan
Indicated that Drogo most likely was already infected with virus since kittenhood, may have been exposed to it at shelter.

Uncertain about the transmission to other household cats, advised isolating Drogo.

Drogo was actively exploring in cab of truck, moving from one area to the next, while continuing to vocalize. Upon arrival at home actively sought a comfortable place while man and I took the rest of the day off to ponder the future.