Yesterday I stopped in the Goodwill store to see if there was anything I could use for Myste such as bedding, padding, etc. What I found was a folding walker with wheels on the front. I brought it home and with the addition of some large sturdy dog collars, a few pieces of pool noodle, duct tape, and some socks I made a walker for Myste.
She was thrilled, delighted, ecstatic, yahoo. As soon as we stood her up in it and she realized it moved with her she took off for the back door and went outside to do her business. She is still weak in the rear legs and this gives her stability and a place to rest when the legs won't hold her. It also provides support when she squats and gives her a sense of freedom that the rear support harness does not. She still has to have a human along with her as the wheels are only on the front and there is too much risk she could tip over ... but oh joy oh joy oh joy!