DD is it only the incontinence issues that is your worry or is it something else??
is it also the inflammation that is concerning you??
there is a homeopath pills that was brought to my attention, haven't tried it yet cause bree hasn't had any problems with her shoulder (knock on wood) so not sure if it would work, but they do say it was clinically proven to reduce inflammation it has arnica in it
it's for muscle pain, injuries and inflammation
if it was me and there is nothing else wrong with shadow I probably wait until your reg vet comes back, unless it worsens.