Cushing's disease regressed and then resolved!
"Dogs are omnivores, just like humans... As is the case with humans, there is a mounting body of scientific, peer-reviewed evidence that shows a plant-based diet to be healthier for dogs. We feed our dogs a vegan diet and have done so for many years. They are in optimal health. One of our dogs developed Cushing's disease at age 10. It was at that time that we switched her to a vegan dog food diet and slowly, but surely, her Cushing's disease regressed and then resolved. Much to the surprise of all of her doctors, she lived to 16... Dogs, like humans THRIVE on a vegan/plant-based diet."
Dr. Ethan J. Ciment