Well not exactly , although we've definitely have had to experience our dogs slowing down quite a bit , but knock on wood because we have always had German Shepherds , and one thing you always worry about with German Shepherds is hip dysplasia which can happen in German Shepherds , but so far we've been lucky , we've never had to deal with a crippling condition , but we've sure seen our dogs running and jumping days become shorter and shorter
One thing I know that has helped ours has been adding those hip and joint supplements , not sure how much they would help with a herniated disc though
Our last dog was a 120 lbs German Shepherd named Ben, he lived to be almost 13 years old , which is pretty old for a German Shepherd , and for the most part was pretty healthy , and could get around pretty good , although you could tell he would get kinda stiff at times , but doesn't everyone after they put on a few years
Then one night , just out of the blue , he threw up , at first , I didn't think a whole lot about it, just figured he ate some grass or something , he had thrown up before , but it was pretty rare when he did , then about a hour later he threw up again , and now the second time , was when the wife and I started to get pretty worried , and you could now tell something was wrong , we watched him through the night , he got to where he couldn't even keep water down , so off to the vets we went ,
As it turned out , Ben had developed Bloat and his stomach had twisted , the Vet said they could operate , but at his age , there was a decent chance he wouldn't survive , and even if he did survive , there has a better then 50/50 change , that it would just happen again
I remember the whole thing was just so surreal , 24 hours before he was just a happy healthy senior adult dog , and then there we were , having to make that difficult decision
That was 6 years ago now , but when I still think back to that day , it's still just a blur
But sorry , I don't really have any advice , watching our dogs struggle and not really being to do a whole lot about it is tough , but we usually figure out new ideas to help, and both us and our pets adapt
good luck