I hope you and the vet will be able to figure out a better treatment for her, I can't imagine what I'd do if I was in your shoes, whether it was Moses or Cali.
I hope the holistic vet can find an outside the box answer for Rosie. Dear older dogs, everything is a worry. I have met a few really amazing holistic vets. Vibes from my crew for Rosie too.
As I learned with Mary second opinions can be truly eye opening. Saved her life once.