Advice needed for fussy dog with cancer

Hey all,

My dog is going through cancer treatment right now and getting him to eat ANYTHING has been a struggle. He has been on Royal Canin GI Low Fat for the past 6 years, has a history of pancreatitis, and is turning his nose up right now at pretty much everything. I've tried all the 'good' brands in wet foods- Hills, RC, Eukanuba, etc- as well as canned and fresh chicken, beef, rice, pumpkin... even canned tuna. Right now the only food I can get into him at all is occasionally some Stella and Chewy's Stew, freshly cooked scrambled eggs, and blueberries. My oncologist suggested Fresh Pet, but I've always been pretty wary of the fresh food companies. Is there one that's a 'lesser evil'? Open to any and all suggestions. I just want to make his last few months as good as I possibly can.