@DigitalBlue My heart goes out to you. It seems this pet has grabbed your heart in a way other pets did not. Spend as much time with your dog as you can, and cherish the time you spend together.
Although my old girl (dog) has not been diagnosed with anything, I can tell she’s getting old. Her age is finally catching up to her. When she was younger, she used to spend time running in the yard, chasing critters in the dirt, barking at squirrels, and most of all, “herding” the children. At one time, we had four or five young children (family and neighbors) who would regularly be in our back yard. Being a shepherd mix, she just loved trying to keep her “flock” in one place!
Eventually, the kids grew up, neighbors moved, and she grew old…first just by calendar, then, the past few years, we started to notice she would move a little more slowly. Now we notice she has trouble climbing stairs, so, for safety’s sake, we carry her up and down when necessary. I know sometimes she just “wants” to be carried, but I am just as sure that most of the time she “needs” to be carried.
I carry her as if I am hugging her, and tell her often what a good dog she is. I make it a point to spend time with her, and groom her more often, just so she can feel “special”.
Maybe I am over-anthropomorphizing her feelings; maybe I am doing this as much for me as I am for her. No matter. She’s been our constant companion for almost 15 years. Will I miss her when she’s gone? I sure will. But I every day she has been in my life has created memories that will be around long after she passes.