I can’t help much with the meds as it is really trial and error to see what works with each dog. I had a couple of oldies with back end/spinal issues, and acupuncture, cold laser, and the Assisi loop worked well for both. Buddy looks wonderful I also had one of those soft harnesses that I kept on Val 24/7 towards the end, very good for helping her get up. Both Val and Conner made it past 14, mostly comfortable, until suddenly they weren’t and it was obvious they were ready to go. I hope Buddy’s leaving is a long way off, but you will know
edited to add, I don’t know if this is an option where you live but I was lucky enough to find a vet who came to the house to do the acupuncture. Might be worth looking around to see.