My 12 year old collie cross has had dry scaly skin on his "elbows" for over a year. The vet said that as it wasn't cracked not to bother - it was his age. It obviously irritated him as he was constantly scratching. I rubbed this on twice a day and the improvement was almost instant. Within 3-4 days he had stopped scratching. His "elbows" are no longer dry and scaly and the fur has grown back. Brilliant product!