I hadn't realized that my cat was steadily feeling worse. Old cats tend so sleep more and be less active which makes it difficult. I noticed the increased water drinking and urinating and that her coat felt dry. Adding salmon oil to her food wasn't helping her coat. I figured it was the CKD getting worse, but a vet visit revealed her kidneys are OK, but she is diabetic. She was getting stinky, too and I started giving her puppy wipe baths, which she absolutely hated. Now that she is under control, I've noticed that she must be cleaning because she no longer stinks and she is "more active". For her, that means coming up for pets, kneading and purring, sleeping up on the bed closer to me, and following me from the living room to bedroom at bed time. The other day, she also had a brief "psycho kitty" run around the bedroom after eating and jumped up into unusual places! She also seems to be having an easier time jumping up onto places where there are no kitty stairs. I had noticed that she was struggling a bit, but chalked it up to old age.
It may take a while for Kitty to feel better; going through cycles of ups and downs can affect your cat. Once he is better regulated, he will probably feel better and act like is old self.