One of my friends thinks it is so wrong to feed chickens chicken but they love it!! They almost took my finger off tonight!
Personally I think its a bad idea. Mad cow came about by feeding ground cow scraps to cows in cow feed. A well known / Brand name producer of corn based cow feed was using cow bones and scraps to fortify its feed. There was also a news article on dogs becoming sick from dog food made in china. The dog food was fortified with ground up animal bones from the local animal shelters.
Human cannibals that eat people on a regular basis begin presenting signs of neurological problems such as ticks and loss of coordination. I don't believe were meant to eat our own kind and that doing so can cause issues down the road. I believe this is true for most animals. Since I intend to use my chickens for my own food supply, I am not comfortable feeding them chicken.