I am so sorry to hear about Romeo's LP! I'm sending prayers your way! Mojo will have to have the surgery at some point (back knees are grades 3 & 4), but shows no symptoms at this point. Ortho surgeon said it was fine to wait on his surgery as long as he doesn't go lame. I still struggle with whether to do the surgery now or wait until he has problems.
Big hugs to you and I hope Romeo has a speedy recovery!