The sugar and Betadine can be used separately without the Epsom salt soak. But if you have already done the soak, that is fine. To make the sugardine mixture, take a few tsp of sugar, and add a few drops of Betadine to make a paste thick as peanut butter. Put that on a pad, and wrap the foot...
Footpad dermatitis can be on the footpads and toe pads. Is that dirt on the toe pads? That can happen when bedding is damp and full of droppings, or when standing in med. Poop can be very irritating to skin. Feel of your roosts to see if they are smooth or rough. Some put carpet or towels on...
The feet have abrasions which lead to bumblefoot. I asked what type of bedding or soil he had been on before—what might have lead to this. Rough roost boards or posts, rocky ground and muddy or damp, soiled bedding is what leads to bumblefoot. I have always use pine shavings in my coop and sand...
What type of bedding or surface has he been walking on? Has it been muddy or damp in the coop and run? Is it rocky or rough? If you could take the bandages off in the am and get pictures, that would be helpful. Otherwise, we have not idea what it might be.