New egg here to backyard chicken. In have been eating meat birds, basically from birth. My family were butchers for three generations, any meat is eatable, offel (spelling?) liver hearts, lungs gizzard, are fine, legs are great if you have no health problems eg diabeties. As for the intestines the lining can be used as sausage skins, (very thin one) but I would be concerned about worms ets, we used it as fishing bait and eat the fish.
I know my dog will eat it and the last time I did a few chooks I noticed that the chooks would take the intestines but not eat it raw, stewed up with some other food may encourage them but I do wonder why???
I prefer to use it as a fertiliser in the garden or the compost and let the chooks eat the worms etc.