Sadly there's not much else you can do. You can try soaking it in Epsom salts and massaging it for a bit for a few days to see if there's any change.
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Getting the hard cheesy 'plug' of pus that's inside will give you the best chance of healing her wound. Once you have the entire plug out of the wound, pack the wound with triple antibiotic ointment (vaseline type medicine available at your local pharmacy, over the counter), get the type without pain relief to avoid possible complications. Using sports-tape, this type of tape sticks to itself great, but doesn't stick to (and later tear) the skin, you can fashion a little bootie to keep the worst of the dirt, bedding, poop out of the wound long enough to form a protective scab.By softening up the scales and getting the pus out, what get rid of the infection?