Our 14-year old Paillion has an enlarged heart. She had a heart attack, which is what alerted us to the problem. She was supposed to be on Lasiks too, but can't keep them down. Her first heart attack was last Feb. (so about a year ago), and she was given just a month or so to live. She is still here, but has little heart attacks once and a while, if she gets too excited, and is started to get a little 'lost' at times (forgets where she is, etc.) however, she is always happy, eats like a champ, takes her naps in her fave spots, greets me at the door, etc. She could pass away from a heart attack (I hope not) or we just need to watch her and kind of determine when we think she's ready for us to let her go. It's so hard. She's my heart dog!
I'll keep Chilli in my prayers. Sorry my experience is a bit gloom and doom!