Appropriate to feed to my chickens??

I am wondering if after I have slaughtered a chicken or two, if any of the innards or the crop is something that is appropriate to feed to the other chickens. I watched a few youtube videos where this one guy was cutting open the crop and tossing it into the coop. I wasn't sure about that. Plus the innards thing...we don't eat any of that. The gizzard or liver or anything that looks "creepy"...lol. But the little dinosaurs, I mean chickens, may eat those things right? I figure if they will tear apart a field mouse or a shrew, then their sisters guts can't be too bad right? LOL I just figured it may be easier than burying them in the fire pit! Any thoughts, comments or exeriences??