I am not addressing your surgery options but offering you something that might help you do some things you enjoy. We have looked into getting a Trionic Veloped walker for my husband. It is a true all-terrain walker. You can get it with 12 in or 14 in wheels. It has 4 wheel but looks like a tricycle in that it has two wheels in the front that are very close together and then two wheels behind that you walk between. Something like this would get you out on rough trails in the woods so you can walk with your dog. Good medicine for the soul!