[My lil friend]

I am the keeper of my mother's 13yr old pom/Taffy. My mother is in an alzeheimers facility. Taffy has suddenly come up with demodex and had a couple of potty accidents on the floor that look more like a 30lb dog left it,instead of 6lb.
Today we go to the vet,yes it is demodex,did scraping. Did a fasting blood panel and urine sample. It turns out that she has all of the symptoms of cushings,is anemic because she has a substantial amount of blood in her urine but not enough to see when I clean her small lakes up. She has to stay in the pen to control where she puts the pee,because you never know when it is going to happen. Her liver enzymes were high as well.
The vet is consulting with an oncologist,there will be more blood testing to make sure that she is diagnosed properly.
What do others feed their dogs that have been diagnosed with cushings. Please share your knowledge.