I hope Scarf can warm himself in the sun. That is what Renzo is doing. Renzo has no disturbing symptoms as Scarf does, moreover I'm not moving anywhere soon unless something very strange happens, but he is peeing too much and has those odd moans from time to time (a little less now, as he loves the heat, and has been able to go out and explore the back gardens - the small yards of what would be three or four triplexes, with a high fence surrounding - a younger cat would easily escape from that - Renzo jumped on roofs of triplexes - but I don't think he has any interest in that now).
I don't think Renzo would survive a move now either. I don't think he is at death's door, but in its suburbs, and I am concerned about whether to accept an opportunity to take part in a women's seminar this summer, in Europe.