I've read all the other posts but still not sure if it is Bumble Foot or what. Just found it today when I did my monthly dusting of the girls. It's hard & thought something was stuck under her foot, when I tried removing it's loose around the edges but stuck in the center. She & 4 others are in an enclosure (dirt flooring with shavings), roosts are 2 x 4 & have no idea what to do. Is it a possible scab? It's too late in the day, tomorrow will pick up some epsom salt (warm water) & try soaking her feet. Do I attempt to remove it? If there's an open wound, what should I apply?