I have used the mushroom chaga on my cat who was full of cancer and it worked. The belly of my cat was full of lesions and had no fur left on her belly. She was very thin and looked as if she was just days away form deaths door. I bought a can of fish and started mixing powered almond seed into the fish, and fed it to the cat everyday. Within a month the lesions were gone and her fur was starting to fill on her belly. She is completely healed now and back to full health.