It does work, you just need to be patient with the soaking and make sure you remove all of the kernel/infection behind the scab. I've seen pictures of enormous lesions where the infection has gotten really bad, and I've never done one that advanced, so that might be more challenging. All of mine have been pretty small, no bigger than what you have pictured, as I check feet regularly and they don't have time to get terrible and large. Once it's cleaned out it may take a bit for the swelling to go down. There is another treatment that is discussed, though not as much. That is soaking with Tricide Neo, which is an antibiotic for Koi fish. You can search for that if you are interested. I prefer not using antibiotics on my hens if I can possibly avoid it, so have not gone that route, but I know it has been used. I don't know if the medication would be absorbed through the skin enough to be an issue with eating the eggs or meat.