I'm reading 'The Art of Racing in the Rain', by Garth Stein, while my chocolate lab, Spirit, ages quietly, moaning only when her legs fail her. The story is told from the perspective of Enzo, a wise old dog ready to move on to the next life. Enzo believes after being a dog several times, one graduates from that level and comes back as a man. He's looking forward to the transition.
Meanwhile, Spirit is still her sweet self, just more tired and slightly crippled with arthritis. We'll take her to the vet and see if they have any ways to prolong her life and increase her comfort.