Our 12-year-old has had LS for several years and has responded excellently to acupuncture/chiropractic treatment once a month (more frequently at the very beginning). A year ago we found he has three bad disks at his mid-back and have had to add gabapentin and tramadol, which have also worked quite well. But he's had other medical issues for years and is now quite thin, and we've found that adding Adequan injections, which we give at home, makes a world of difference.
In addition to all that, we have carpet or floor-covering everywhere he needs to walk, including the deck and stairs outside. He prefers the ortho beds around the house. And it is helpful to have the beds raised a bit, by whatever means, so that he can somewhat step off them with his front legs and thus have to work a little less hard to lift his back end. Oh, and reasonable-length walks to keep all his muscles in good order is very important, as that's what supports all the bony parts that are misbehaving. Good luck, it's doable.