I had a hen with abcess on foot, between the toes. I didn't know this was 'bumble foot'. Never considered culling, and, anyway, she was looking after 6 chicks at the time. With a friend to help, I did most of what Fleecewife advises in her posting, using that purple spray that my friend has for her horses, salty water and tcp- well, everything that was to hand, actually. I squeezed pus but it was hard so couldn't get it all out. Did this one day, left it bandaged overnight, repeated treatment following day, and again on 3rd day but then left it un-bandaged, and it's been just fine since then. That was about 3wks ago. Chicks have gone and she is laying again, no sign of discomfort.