I would apprecieate any ideas on what might have killed my cat of 8 yrs. He was a In and outdoor cat, via a doggy door. Had been all his life. Moved to Okmulgee Oklahoma in 10-05. "Key", his name, absolutely loved his new fenced yard, birds, bunnies etc. Often brining in his "kill" for my purview. He was current on all preventative shots. On late eve of June 6th,06, I found him extrememly lethargic. Time was after midnight, I thought I wait till morning. In the morning he was almost comatose. Took him to a nearby vet, the front desk person said that she didn't feel that much could be done, but when the attending vet returned I would get a phone call. Until the vet...