I put a call into the vet for guidance. It may be that I need to shoot Sancho up with painkillers and vitamins like we did for April. He won't like it when I'm doing the shot, but I don't want him suffering.
He is going to be SIXTEEN years old in February. I know I'm going to lose him at some point. I'm ok with that. I'm not ok with him suffering during the cold months when I could be doing something for him.
ETA: The vet recommended a goat-coat as a start, and perhaps a visit by him to see if there is any underlying issue that we should mitigate. I'm going to add April's Oatmeal to the prescription because warm food on a cold day and a few asprin can't hurt.