I bet she's happy having her wheel back. Wonder why she's still on the Sulfatrim if the skin condition wasn't bacterial? Hopefully not for long.
I started a thread on probiotics recently as I needed some for our robo while he was on antibiotics - there are a few mentioned on there. Pro C seems popular generally and it's easy to get hold of.
Probiotic Options
I just forked out for Benebac on Amazon which was ridiculously expensive - I'm sure some of the other options would be fine. The one Cypher mentioned is sold by rat rations.