theoretical question about diet

[JacinLarkwell]

I'm very curious why feeding raw meat to layers for eggs to sell is bad. Can you elaborate?

I'm also curious about the feeding of dead animals/carcasses to chickens. I encountered this for the first time today at an organic farm and was slightly shocked. I'd never seen the practice before. The animals had clearly been dead a long while (looked like a couple of young cows), but the chickens didn't seem to be eating what was left of the carcasses, just kinda poking around them.

I looked it up online and read that some small scale farmers do this so the chickens can eat the fly larvae that get laid on the carcasses for extra protein. I would think the chickens could tell not to eat spoiled meat from an old carcass, right?

Would love to hear thoughts on this practice, it is completely foreign to me.

Pretty sure it's not legal since there could be health risks if there was something wrong with the meat.