I've heard this for years but don't know if it actually works. There might be some scientific studies on line. The thing with septic systems is that they work with anaerobic bacteria action (without oxygen). I'm curious of the perceived benefit of letting it mostly rot down before your even 'install' it. The other side of the argument is that the vast majority of septic systems work quite well for years without them.
Of course the obvious answer to "why toss in a dead chicken?" is that live ones put up too much of a fight.
Of course the obvious answer to "why toss in a dead chicken?" is that live ones put up too much of a fight.