Circumnavigating the Cone of Pwned
He's got the cone for ten days, 3 days' worth of painkillers, and a round of antibiotics for morning/evening dispensation. He's shakily coming out of the anesthetic and responds to my voice and pettings.
The other big news was that the culprit was not canine, but feline. My prime suspect is Pretty Boy, who is a couple weeks removed from having been snipped, and who is still getting the aggression out of his system (he is calm around some of the others, gets in the grill of certain others, and is afraid of me) and was back for a week or so when Mags went missing.
So... that was exciting in ways I was hoping to avoid. It's never good when "I wish you'd had your nuts cut off by strangers" is the preferred option, but it looks good for our butt-shaved hero right now.