When I switched from Purina Cat Chow to Purina Cat Chow INDOOR Formula, that's when my Creamsicle's allergies started. I seem to recall someone telling me that the Indoor formula has more coloring in it and that could be what she is allergic to. It may be the same w/Hermes. Problem is that I was also told that it could take up to 12 weeks before all the allergens are completely out of her system, so you may have to wait a while before you see any result. Good luck w/this. I know how frustrating it can be.