Pug contorting body due to itch / neurological problem

Buffy the Vacuum Slayer is having what appears to be an outbreak of an allergy related whelp on her right hip. It is causing her to have difficulty walking. The severe itch is causing her to twitch her leg. Two different vets diagnosed this as allergy. The first vet gave Benzoyl Peroxide shampoo which also cured the Pruritis on her neck (itchy sores.) The second vet did a Chiropractic adjustment, which stopped the back toe dragging (a readjustment has to be done once a month.) The third vet diagnosed food allergy and suggested an alternative DNA therapy treatment in addition to other things such as acupuncture.He also treated her for secondary yeast and bacterial infection on her neck. This has resolved with antibiotics/fluconazole. Haven't pursued this due to finances. The Benzoyl Peroxide shampoo has been great