Diamond V XPC, it’s a form of brewer’s yeast, and its good stuff. It’s animal feed (!), but I’ve found it more effective than epicor the human version. Let me know if you want more info.
I have read about their XPS. What is the difference?
Could you tell us more? Where did you buy it? How much did you give him? How did you give it to him? How long did it take before you noticed an improvement? We are trying coconut oil, but would like to add anything that would help. Thanks!!