If the bumblefoot requires surgery, do one at a time. There are many who try non-surgical methods, so I would suggest dojng some research on Tricide Neo for soaking feet, and other methods. Here are some links to read:
https://ouroneacrefarm.com/2013/11/09/bumblefoot-treatment-tricideneo/
https://www.backyardchickens.com/th...lefoot-still-recommended.681495/#post-9211642
https://ouroneacrefarm.com/2013/11/09/bumblefoot-treatment-tricideneo/
https://www.backyardchickens.com/th...lefoot-still-recommended.681495/#post-9211642