Its a matter of risk management, and risk tolerance.
As
@Red-Stars-in-RI correctly notes, chickens aren't like many carnivores, their digestive system is substantially different, resulting in different concerns with composting their litter.
I do, personally, then
use that soil to fill garden boxes where I grow plants, most dsestined for my own consumption.
Rare that they get meat scraps from my own table, the wife and I don't waste much. They can picj thru the ash pile after I've had a burn, it frequently contains charred bones (chicken and pig, most typically) which have been weakened by first stewng, and then high heat burns. If they don't, the ash pile gets added to the materials breaking down with their waste and the leaves I gather for deep litter.
Do they get raw chicken from birds I process??? Again, yes, with caveats. Though there are no known prion diesease (think "mad cow" as example) in chickens, I don't feed the skull or spinal cord. Neither do I feed the gall bladder, the liver, or the kidneys - the gall bladder is "radioactive" (ok, not really, but I am really careful to dispose of it cleanly when culling), the liver and kidneys are where heavy metals tend to accumulate, I don't want to pile on, by placing concentrated sources back into the food chain.
The things I don't feed (head, backbone, feathers, etc) go into a seperate bin which gets a very hot fire once a season or so - and then the ashes are mixed in with some of my clay soils, not shoveled on top of their litter. How hot? I'm building a new rocket fire pit because the existing pit won't make a ham bone crumble to dust at a touch. I'm hoping to be able to reduce goat femurs to complete ash with the new one.