Thanks to Yelpers, (again) I have found a very good bone cracker. Mom is 84 and has very sever arthritis in the lower back. He explained to her that she needs to exercise more to keep the joints moving. He put her on a table and put some cold spray on and gently moved her legs and back to get things loosened up. I was worried that he might try to shift her bones around but he said, because of the arthritis being so bad, it is not a good idea to do that type of work on her.
His prices are very reasonable and as you can see from the other reviews, he's one to check out if you need such a doctor.