You have been given very good advice from Suzie and Chickensaresweet. Here are some links with videos about bumblefoot and surgery:
http://www.the-chicken-chick.com/2011/07/bumblefoot-causes-treatment-warning.html
http://www.hobbyfarms.com/livestock-and-pets/how-to-treat-bumblefoot-in-chickens.aspx
http://www.the-chicken-chick.com/2011/07/bumblefoot-causes-treatment-warning.html
http://www.hobbyfarms.com/livestock-and-pets/how-to-treat-bumblefoot-in-chickens.aspx