I've been using Yeasty Beasty Protocol by Pawdega for two full months now, and while I haven't seen any dramatic "big visible manifestations" in my dogs, I'm definitely noticing a range of positive, subtle improvements. The persistent "doggy smell" that used to linger is now gone, and their excessive paw licking has significantly decreased. Their fur has also taken on a healthier, glossier appearance. I'm also pleased to see a noticeable reduction in tear stains, and the browning on their paws has started to fade. One thing to note is that the powder seems to last a very long time.