We used one on Monty a while back when he suddely developed extra muscle on one side of his back, it turned out to be a muscle spasm.
She made a huge difference to him, within one treatment he looked more compact and less rangy, and his schooling started to improve when he didn't hurt.
As an afterthought we asked her to look at our border collie bitch who was getting old and stiff we thought. We were a bit shocked when she charge £40 for the dog, but afterwards realised it was worth every penny, the dog can now run and jump like she used to when younger.
I would definitely give one a try, we have previously used three or four qualified and registered physio/chiropracters and nothing works as wel as mcTimoney...