I would try a limited ingredient diet.. Natural Balance has some.. they really limit to one protein and you can go from there. You may want to do a food allergy test at the vet as well.. it can be very helpful in determiing what's bothering her. For now.. I would say benedryl for the itching.. 1mg per pound.. so normally I give Titan 3 1/2 pills (most are 25 mg pills).
Commander Charlie Titan-15 Jan 2010
Gulf Coast Search and Recovery