That is so true about OEB breeders having very different opinions. I had no idea about the issue until I read your post and Googled. There are lots of them in the waiting room at my Vet's office because of the nearby Marine Base and that sort of dog being their mascot.
The only thing I know for sure about them is that every one I shared space with had really bad gas.
All my dogs (2) with mobility problems had knees that were not riding in the proper groove. This can be felt if you poke around and compare to other dog knees.
I also had no idea that dogs got growing pains. Today I learned two things before I finished my coffee.
