I'm no vet but have dealt with bone sequestration on legs.(not shoulders)
I haven't had any luck with the body absorbing the bone pieces, even the small almost grain of sand size pieces. One horse continued to blow out for a couple years after the initial injury until I had the vet go in and clean it out.
Another horse only blew out again once until the bone came out. Thankfully the bone was in one piece, the size of a quarter, I was able to remove myself and he healed perfectly.
I DON'T LEAD 'EM AND FEED 'EM, I RIDE 'EM AND SLIDE 'EM.
PLAYBOYS OKIE CODY "HOOEY" 10/21/2019