The chicken wire could very well be it. Another thing that might be too hard on her feet is the ramp. The blocks are very tall and have sharp edges, and might be digging into her feet, especially as she needs to grab onto them to climb against gravity on her way up. You said you need to put her...
If you leave bumblefoot untreated, the infection can spread to the bone and other tissues of the foot and leg, and slowly kill your bird. I recently helped a friend process a rooster who had been waning from bumblefoot for over a year. His foot looked horrendous. He couldn’t walk and had bed...
Bumblefoot isn't caused by imperfectly cleaned coops. It's physical damage to the foot - like from walking, perching or jumping on surfaces that are too hard, too sharp, etc. The wound gets infected and that's when you get bumblefoot. If you have the conditions for foot damage to occur in the...