I was going to stay out of this because I don't feed raw, but FWIW:
Minnie, diagnosed via scoping > 8 yrs ago, is fed kibble. Once a week, everybody gets some sort of a chew: dehydrated this or that, frozen raw whatever. As long as I give her something to which she is not allergic (according to the blood tests) and is not too fatty, she's fine. She can, for example, enjoy a chunk of lamb flank or a beef rib. Perhaps she could tolerate one chew of something to which she is sensitive, but I wouldn't risk it.
ETA: At the moment, she isn't on any meds. If I need to give her Metacam, I use Misoprostal; if her stool is soft, Tylocine (Tylan). Fortunately, she hasn't needed pred for a long time. Fingers crossed that she remains as stable as she's been.