My dog is very old 17 maybe 18 years old and can't see or hear at this point. She shows her age as old folks do sleeping all day and staying up all night.
We have this routine each night. I settle in around 1:00 am and fall asleep pretty quickly I usually sleep for a couple of hours and then I hear her nails tapping on the floor. Just as I leap up it is too late and she has relieved herself on the floor. It doesn't matter at this point because I have tile on the floor. I clean things up and go back to bed. At this point she is awake and starts wandering around the house bumping into things and about daylight will settle back in.
The other night I woke up and couldn't find her anywhere. I thought the doggy rapture had taken place. I searched the whole house and finally found her wedged underneath an ottoman coffee table I have at the end of the bed.
She is in pretty good health and her quality of life is still decent. It is me that is suffering. I know if I took her to the vet they would recommend putting her down. Taking a life, it is hard for me to even kill bugs most less something I love. I did make that choice for my other dog when she no longer could stand, that seemed clearer to me than this does.
I did try something different last night I put her in the kitchen and closed my door so I couldn't hear the tapping. I do feel more rested but it did seem strange not to feel her presence in the room.
I guess I will know when the time is right.