I purchased this a couple of months ago for my sons dog. The dog is an 8yr old 50kg Australian cross cattle dog, mastif , collie. He is literally a gentle giant. In the last 6 months he has had very bad joint movement all over his body. He couldnt stand up without aid the next day if we had been for a long walk. His back end was affected the worst.\nHe has been on MyBeau now for a month and a half and the difference in him is honestly nothing short of mind boggling. Hes a different dog. His way of walking and generally the way he moves has loosened up dramatically. Even his paw joints have loosened up. He plays heaps now whereas he couldnt before taking the Bone and Joint because every joint in his body appeared to seize and cause him pain. I really cant recommend this MyBeau enough. If a big dog like this can be helped, then I reckon its worth a go.