I don't know if this is a good product or if it works or not because after I bought it and did some more research I realized that I should not be giving this to my cat with kidney disease because it raises insulin and cortisol level which I believe could also raise blood pressure and burn more calories, things that CKD kitties do not need.
My Silkie Terrier has allergy problems. We recently changed to Pro Plan for sensitive skin. He gets Apoquel and now MSM. He is no longer chewing on his rump. I am attributing the improvement to the MSM.