My horse has cushins disease , i had real trouble clearing mud rash i tried camerosa cream but nothing seems?

to be working any other ideas cheersMy horse has cushins disease , i had real trouble clearing mud rash i tried camerosa cream but nothing seems?
I don't know much about equine diseases, but I had a horse that had a cut on the sensitive bottom of foot, and I used Epi-Otic ear cleanser for dogs as an off label treatment under the supervision of a vet, and he said all the horse owners were using it to heal wounds.