Well, we're currently going through end-of-life hell with Sagan (there are pictures of him in this thread). His arthritis is getting horrific. I won't bore you with the details of how we got to this point, but a couple of weeks ago we thought we finally solved his pain management issues, and he improved.
Yesterday, he was really clingy and had to be with me everywhere, but since I was just watching golf and barbequing a roast, no problem. Everytime he got down from the couch, and came back, I had to physically lift his hind legs for him. By comparison, a year ago he'd leap up and because he's tall, he only has to lift his paws a bit higher than his chest to climb up. One time, he came in from out back and he had shit on the back of his left leg and on the top of his left hip. He'd literally shit and fell back in it. We had a little washcloth session after that and he just laid there passively as I cleaned him up. Two years ago, he would have snapped at me for daring to touch his hind quarters, let alone wash his ass. Then, at dinner time, he couldn't stand on his own while he ate from his bowl. Mrs. P or I had to be there to hold him upright while he slowly consumed his meal with none, and I mean none, of his normal enthusiasm for food. He was totally robotic, and seemed to be completely unaware that one of us was bent over with our arms round his crotch supporting his hind legs. Completely bummed me out and I proceeded to get shit-faced and passed out early.
Of course, this morning when I got up he stood up, as naturally as can be, from his bed in the next room and proceeded to wag his tail in greeting. I realized then, that I hadn't seen him wag his tail in days. But, yeah, so far this morning he's doing really good.