My almost 19 year old Bradshaw was so healthy the vet said "he might be one of those cats who lives into his 20s". He could still jump from the floor to the counter and had lost almost no muscle mass. He got regular checkups and the only thing that we treated him for was hard stool once in a while. My husband called me at work and said Bradshaw was acting funny--he was going into the basement, on the porch--this was a cat who spent 23 hours a day in our bedroom. When I got home he acted "funny" his eyes seemed a little wild and he didn't want to sit on my lap as he usually did. We took him to the vet the next day and his labs were all good. Took him back later that day for more blood tests. This time his red blood cell count was low and his white blood cell count was high--neither off the charts. He got an antibiotic shot and came home. By the next morning he was nearly comatose. We took him to the evet to be put to sleep and he died in my arms. I am kicking myself for not getting an autopsy but we decided it wouldn't change anything. I had 10 cats at one point and all but two are gone now and the one thing I have learned is that cats can really go downhill fast. I miss him so much. Anyone else have this kind of experience?