With a heavy heart, I heard from the vet that S has anal sac adenocarcinoma - an aggressive nasty cancer. We're heading to a vet appointment to make a plan of action which will include more tests to figure out if it has metastasized. I've shed some tears but then I looked at S. He's feeling good today - acting like his usual jaunty, goofy, and happy self. So, this is a precious day, and I'm going to do my best to enjoy his loving presence.
More later but many thanks for the words of support that people have sent.