You can certainly get different opinions on here but realize that is what they are, opinions. We all do things differently. That doesn't mean I think others are wrong, just that they do things differently.
I also like to reuse everything I can. If it's not a cut of meat I put on the table and is suitable, I use it for broth. The liver goes to the dogs. When I butcher I have two buckets handy. One bucket gets the stuff I feed back to the chickens. That includes various bits and pieces I take out like the sexual organs and lungs. It incudes fat and just bits of protein. I pretty much put in the entire digestive tract. I open the guts some to check for worms, then cut them into maybe 4" to 5" lengths. I don't empty them out. I figure there is nothing in there that isn't already inside the still living ones. I open the gizzard (which goes in the broth) into that bucket. I don't want to give them more than they can clean up before dark, it could attract predators, but they get many different things.
The stuff I don't give back to the chickens is generally buried in the garden. The Pilgrims were taught to bury a dead fish whenever they planted corn. Same type of thing, it will rot and the garden plants will eventually use it.