Shaking my head in total disbelief.  Just gutted to hear what's  going on with Jake while you are dealing with Ringo' s  challenges at the same time.  So bleeping sorry.

Yes, do check into braces  and, as Jerry suggested,  bisphosonates.  If you have access to a Rehab Specialist, maybe chat with them about braces also.  Ask avput acupuncture  also as a way to manage the pain.  Check into CBD also.

While fractures do happen, and sometimes out of the blue with NO limping showing up at all first.  And many, actually most dogs who have been limping off and on for months because of misdiagnosis (treating for arthritis, treating for sprain, etc), never have a fracture  before the diagnosis is figured out correctly.  

As far as the mets, clearly he has no symptoms from tjpse, so that's good.  I think if you can figure out how to get the limp managed so it's  not roo painful, you should have some good quality  time  moving forward.

One more suggestion, if you have access to a Sports Doctor  Veterinarian , possible they would have suggesrions.

Every single one of us are putting forth as much pawsitive energy this community has to offer to help Ringo and Jake continue on woth good quality  life❤

Love  and hugs

Sally and Alumni Happy Hannah and Merry Myrtle and Frankie too!