Alum powder works well too if you have some in the cupboard.
I have used it on several occasions for leg/foot wounds with proud flesh. I make a paste with furazone or honey and wrap, in a couple of days the proud flesh will start sloughing.
Sounds "hippy dippy" but it works.
I DON'T LEAD 'EM AND FEED 'EM, I RIDE 'EM AND SLIDE 'EM.