If she's got used to the wet food I'm not surprised she's not really interested in kibble.
Archie used to be fed a mixture as a pup but he got very fussy.
He eventually just used to spit the kibble out and I abandoned it completely. A good wet food formulated for a sensitive pooch is what I would be looking at. Salmon and potato is what I have been told to feed Archie due to chronic colitis. I use Wainwrights wet trays but also occasionally fishmongers finest or forthglade. I don't know if there's a puppy version of any of these in the salmon and potato variety though.
Archie also has problems with itchy skin. Often it seems to be seasonal allergies. It's a nightmare for both of us when it's bad but I mostly manage to keep it under control with simple antihistamine tablets. This summer has been really bad but, thank goodness, he is settling down now it's turning colder.