My rooster has a black knot, like a raised black carbuncle, on the bottom of his foot. I assumed this was bumblefoot and treated it with Tricide-Neo a few weeks ago. It got smaller but is still there. It isn't swollen and doesn't look infected (no evident pus, etc). It's hard and if I scratch at it, it flakes off. He favors that foot slightly but doesn't seem to be in pain. Should I treat it again? Will it go away on its own? Should I worry? Any advice would be appreciated. Thanks!