I had a rescue pit mix with bad knees... seems like he got around ok... wasn't pretty and the knee eventually fused (stabilized) somewhat and gave him problems only after moderate to high running and playing... I think the dog can have a good life with a bum knee but 2 is pushing it IMO.
This guy is boring but at a bout the 3:00 mark he gets into the diagnosis part and this will answer your ? about that.
P.S. We need to get together and mess with some dogs soon.
E-Dog - 2012 WPBTCA National Championships
The time when screech owls and Bandogges howl and spirits walk and ghosts break up their graves.
Act I, Scene IV of William Shakespeare's "King Henry VI"