A.S.
Did his chiropractor take x-rays to see what's really happening inside? I worked for a chiro in Tonganoxie and he was very thorough (but they want you to come all of the time). I watched this doctor successfully treat herniated disks and it was amazing to see the before & after x-rays.
When I moved back to KC after being gone for several years, I found another chiro who didn't want me to come as often and he didn't take x-rays. He ended up treating me the opposite way that he should have. He was pushing down on my back when that was just making my problem worse. I ended up back at the chiro I had worked for and he did x-rays and made everything better.
Trouble with a bulging/herniated disk or ruptured disk is that an ortho surgeon will want to do surgery right away and once those disks are fused together, there's no going back and there are complications with having back surgery (long term affects).
I'd suggest that he try another chiro who requires x-rays so they know he's adjusting his back properly for his problem. Surgery should be a last resort.
If you need a referal for a chiro, you can call the Cleveland Chiropractic School here in KC and they can probably refer you to someone.
Good luck and I hope his back starts to feel better.
(BTW, I am not a chiropractor - I'm an HR person who works at a hospital system - so you'd think I'd be telling you to go to a surgeon and have surgery, but I'm not.)