Well, I was unable to get a vet tech appointment -- the vet wanted to see Sam so we went for the appointment this morning.
The vet was pretty aggressive in treatment even though there is no broken skin on Sam's hocks. He put Sam on some oral banana-flavored baytril, a special topical solution for his heels with DSO and Baytril, and suggested putting one of those white grills from Tractor Supply over the carefresh in his litter pan to prevent Sam from standing in his own urine. The DSO is an interesting substance. Originally developed for use in horses, it is a highly penetrating anti-inflammatory that is able to carry an antibiotic with it through the skin. We have to put it on just once a day so long as Sam lets his feet stay wrapped the way they are shown in the article at the top of this thread. Otherwise, we have to apply it twice a day. We're supposed to wear rubber gloves while applying it, too, because it could penetrate our skin. I don't know that we will actually use the oral antibiotic. My husband worries about what it does to the rabbit gut and what it doesn't do when you overuse it. Also, since the skin isn't broken even, it doesn't seem like he's at that high of risk for infection.
So far Sam still has his little VetWrap booties on so I am hoping they stay on the rest of the day. He was a very good boy while at the vet, and I was ecstatic when he weighed in at over 13 pounds -- he has twice been disqualified as a senior show buck for being slightly below the mandatory 13 lb-minimum. He's just one big growing boy!