You may also want to try turmeric. It's a natural anti-inflammatory. She would need to eat it. Maybe sprinkle some on her favorite treat.
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That second picture looks like you have an open sore there. If you hadn't already completed two rounds of antibiotics I would say infection. I'm still kind of leaning that way since it's possible that she didn't get the right antibiotics but I'm not a vet.
Have you tried soaking the foot in a warm (about quail body temp or a couple of degrees warmer) epsom salt bath? If there's an open sore, it will soften the scab and maybe allow it to drain if there's matter in there.