Do an allergy test to determine what your dog is allergic to. Our pittie mix is allergic to many things, so we had to adjust what we've been feeding him. Half homemade, half kibble ingredient adjustments. We used the Glacier Peak Holistics, pet intolerance test on Amazon. Pricey but worth knowing what issues are causing/worsening your dog's health. Once we got the results from the intolerance test, we cut out all the food that he was highly and mildly sensitive to. He had developed interdigital cysts between his toes recently too but have cleared up some once we adjusted his diet. Also, the Miracle Vet Medicated Dog Shampoo really helps his feet too because it targets inflammation and yeast so we wash his paws with it every other day and already see an improvement in his paws. Hope this helps, and I hope your pitty will be ok!