Teddy has had (and still does) disk issues for the past year. He is only 4.5. We immediately switched from Martingale to a harness so we would not pull on his neck area and I don't know if acupuncture is an option for your boy but it really helped Teddy.
We also have him on a disk supplement, glucosomine, msm, vit. c, and other goodies from greyhound gang.
Hoping for a fast and uneventful recovery. If acupuncture is an option, please check into it. It really made a difference and now Teddy doesn't have to go every week. We are on maintinence.