A friend of mine had a german shephard that she rescued a few years ago now she found her roaming around the field behind her house and was very lame she put food out for weeks until sheba gained enough confidence to actually come to the food while they were there,so on closer look they noticed a very angry sore on her hip they took her to the vets who xrayed and said the injuries looked as if she had been possibly thrown from a moving car, her hip was in a terrible state, anyway they got the hip going ok, but when she reached about 10 she began to walk lame again and the only option was to have a total hip replacement, by then she was about 12 and anesthetic was quite risky, she was on lots of meds but in winter she would be in a lot of pain ans she tried the magnetic collar and i couldnt believe the difference it literally took years off her, it was amazing it would definetly be an option for me if my dogs ever needed anything like that it got to be better than them taking so many drugs, and to make such a difference to sheba with an especially bad hip then its got to be worth having.