dog will not chew food
Answer: dog will not chew food!!!
All I can think of is creating a highly digestible large ball that must be chewed! I think you will have to get him chewing before you can even consider chook necks and such. What if you were to soak some dry food, get some mince, bread crumbs or wheat-bix, maybe some veg, blend it up and cook it all up like little meat balls or rissoles? You may have to try different sizes to see if one works better than the other. If it is all blended up, it should digest easily if he does attempt to gulp it down in one. Would also suggest hand feeding initially for assistance. Good luck!