My beautiful rottweiler of 11 years was starting to have trouble raising her hind legs from the floor. It was worst during rainy days. She would just lie on the floor most days. Some time went by, then a friend of mine recommended some enzymes for dogs, Enzyme Miracle, to me. She had good results with it for some other issues... After using Enzyme Miracle for just 4 weeks Aries was climbing the stairs and actually running again. I could hardly believe what I was seeing. We will be customers for a long time.