Lisa, that's exactly how it was for us. I couldn't imagine putting our 14 year old dog through that for just 6 more excruciatingly painful (for her) months. I'm surprised it's an option, to be honest.
We made the choice to put Star down in the evening, and she died in her sleep that night. I guess we were kind of lucky in that regard.
Short lives, but I don't think I'd trade it for anything.
Star in her prime: