My Ryles had an X-ray a few years back to check out his knee which he injured while playing snowballs. In that X-ray she noted that he had spondylosis of the lower spine.
Our choice of vet was holistic in fundamentals and conventional when need be. What she recommended and we followed was chiro adjustments, laser and some acupuncture. We did this, numerous subsequent visits initially until he was "normal" again and then moved on to maintenance. Chiro every 4 weeks.
Ryley never fell over until this last year ( about 6 months before he passed) - I suspect he had some degenerative myelopathy happening. As he would fall and also knuckle his hind end and weakness. I did some rehab with him to get him to lift his feet and remember that he has back legs.
I am not vet, that is for sure. Ryley was 13 and as most doggies, he had arthritis and the spondylosis. He too still tried to jump and buck and play, he seemed to tire faster.
I would suggest as other, try some chiro, laser and acupuncture. I suspect the falling over is from something else and with chiro laser and acupuncture, he may "loosen up" and be a little more steady on his feet.
We did not use pain medication until the last month of his life when he started not being able to climb or descend stairs. Again I cannot say that was from anything in particular. We had Ryles on a number of supplements over the years including Recovery SA, Biologic Vets Senior, Fats, Vites. Did they make a difference? I don't know, there was no other Ryley to have on placebos.
The cost of laser is pretty reasonable here in BC along with chiro and acupuncture.
I am sorry the costs are adding up, I too would be wanting to know what is going on. If you wish more chit chat, please pm me.
At the end of the day, look at your handsome boy and do what is best for his quality of life, if it happens to be a little laser (some doggies love the heat) then that is what makes him better.