Our vet has seen a couple of our chickens though he doesn't normally have chicken experience (he's very nice). I called him about the bumble foot going on and told him about this and he really liked the toothbrushing idea. I happened to have some Mupirocin ointment and he said that ought to really knock it out, so I'm using that.
I wanted to ask you how often you unwrapped, re-treated, and re-wrapped their feet and how long it took for the scabs to fall away and their feet to heal up. Also, once the scabs fall off, did you keep applying the ointment and wrap their feet? If so for how many days longer until you were sure it was healed enough?