I have been treating a hen for weeks for bumblefoot using all the methods listed here. I was not making any progress and started using black drawing salve twice a day and then wrapping with gauze pad and then vetwrap. Her feet are remarkably better after 6 days. Two questions: How long can I use Ichthammol on her feet? She has been in vetwrap for so many weeks how do I toughen the bottoms of her feet when she no longer needs the wrappings. Thanks!!