At the time another farrier was out and he suggested putting her on a diet that cuts out starches and sugars (decreasing inflammation) like a horse foundering. We are game to try it because it sounds like that makes sense.
When my farrier came out two days later, he agreed with the assessment, trimmed her like usual, and didn't put either cast back on. So, we are officially 100% barefoot! She is wearing Easyboot RXs for right now, but she was completely sound yesterday after the trim and today (on concrete with or without the boots).
I'm pretty pleased!