Seems like I've seen this discussed on the forums throughout the years. I have read things like when they have no more joy. I don't know what that means. I don't know how you tell.   I finally got myself mentally prepared to put my 14 y.o. Cockatoo down, but he seemed perkier at the vet. He probably has liver cancer, but to know for sure would require expensive testing which I would not treat anyway.   All I know is I am mentally and physically exhausted. I am taken back to several years a