Still hoping it works on my 4yr old Airedale. He has terrible itching on his skin, predominantly on his back and tail, been using the Derma 03 for a month and starting to see a bit of a difference in his chewing pattern. Not as bad as it was but he still tries sometimes. I will continue use for just now as I know it doesn’t happen overnight for complete cure. Service from Ace Canine absolutely brilliant.