Though not as pod reliant as mandarins, leopards pretty much graze for pods all day. As stated above, get them eating frozen and pellets if possible before adding her to the DT where she has to compete for food. Note that the frozen and pellets are for supplemental dietary needs.
If you don't already have pods in your tank, be prepared to add them weekly until a self sustaining population is established. You can do this while your leopard is in QT for treatment and/or getting her used to the food you feed your fish. I'd set up a fuge and add a couple thousand pods to it, then another thousand, or so to your DT at night with the powerheads off so they can make their way to the rock. Remember to turn the powerheads back on in an hour or so after adding the pods. After that, another 300-400 per month for a couple of months should have your pod population booming and self-sustaining, and your wrasse happy. For an instant pod population, go with the live mature pods, as the bottled pods take a while to mature and be large enough to keep a fish happily fed. You may be able to get away with adding a bottle in addition to what is prescribed above to your fuge. Sounds like overkill, but I've ordered pods from just about every vendor on the web, and what is advertised as 1,000 pods is probably only about half of what is actually received...
Best of luck, and keep us posted...