We have ten hens, six of which have bumblefoot. They are three years old and have been very healthy....thus far. One of our big Buff Orpington gals was walking with a limp yesterday, so immediately we thought she had a hurt leg from jumping down from the nest boxes. -picked her up, checked the leg, then noticed a round black scab on the bottom of one of her feet. We then decided to check the other chickens, and sure enough more had the same round black scab things on the very bottom of the feet. We would have NEVER noticed this as the feet are clean and aren't swollen (and it isn't at all noticeable from the top). -researched and read how to treat and soaked in Epson salt, did "surgery", applied triple antibiotic ointment, and wrapped three of them. -kept them indoors on clean towels for the remainder of the day, and returned them to the coop last night. Is there ANY other treatment to cure this???? Our coop is scrubbed and cleaned every day. (immaculate, IMO) The run is scooped and inspected three to four times per day. We are stumped as to where/how/why they are contracting this. Their nest boxes and roosts are 36 inches off of the ground, and I do have heavy breeds. My bantams fly into the rafters to roost, also. Is this this the culprit responsible for the foot trauma????? All suggestions and opinions are welcome.......we need some help, here.