"At almost 20 years old, my wonderful Grendel really needed something to make him move like his younger days. I tried MacaHorsePower? for 1 month. Grendel is behaving like a youngster! He has a better disposition, wants to move forward and is playing like a young horse again! Grendel is large and was becoming difficult to move. Now he seems rejuvenated and more energetic. Thank you MacaHorsePower!"