Thanks, guys.

Kat, we're at 'allowed inside for a bit each day'.

DW, I'll look there. This kitty has to get vetted pronto, as he now has an eye infection (which I gloomily suspect is conjunctivitis associated with FLV). I've been treating it with antibiotic goo (as suggested at a vet site), which seems to be having some good effect. It has not spoiled his appetite. He eats three times what my own cat does, and I feed him as much as he wants because little house or not, it's cold out there, he needs the calories... and he's growing like a weed.

I'm aware there's some risk to my own cat, who has had his needles, etc., but I also know there'd be no way to keep him away from other cats anyway, since he's an indoor-outdoor country cat.

I am trying so hard not to get attached to this cat, but it ain't easy.