I'll just share what has worked for me. One a chicken hen the other my little Runner. I soaked the foot in warm Epsom salt water and after applied clear iodine over the bumble I keep soaking and applying until I can easily peel up the scab with my finger nail some times it takes 3 days sometimes longer but I make sure the scab will easily come off. With my hen I got the scab off and used a pair of sterile tweezers to pull out the bumble because pus in poultry is thick . Then I pack the hole with triple antibiotic wrap and wait a few days remove the bandage and check to make sure there is no more bumble this time I spray with veterycin and wrap till healed. With my Runner I did the same thing but when I peeled the scab off there wasn't anything there? I have had this happen with a few of my chickens too. So not sure if the clear iodine helps to absorb the bumble or what but that one I just sprayed and let her go back with her flock. I don't know how bad yours is can you get some really good pics?