Sorry to hear about Mason.
It's really hard to have a young dog so limited in even being allowed to be a normal dog...no much of a life.
Have you read this thread?
http://www.rottweiler.net/forums/vet...dysplasia.html
There may be some information there.
I would not be fooling around with a regular vet for this type of thing...and would see if you can get in to see an orthopedic vet. They may have some suggestions.
Good-luck to you and Mason.
Gina