What products were you using and how much? For Cushings I have used DIA-IONX and Phophatidyl serine. In addition it is helpful to give digestive enzymes with each meal, MSM, probiotics, vitamin C, and OMEGA 3,6,9. The oligotherapeutic mineral base found in the IONX products helps the body to better utilize the other nutritional substances given for a synergistic response and faster healing. Also be sure to give sufficient fresh water that is free of chlorine and fluoride. The other thing that is sometimes beneficial is to have a certified veterinary chiropractor check for spinal alignment and make any corrections as necessary.
Please let us know how you progress.