Everyonce-in-a-while I take some chickens to the Mennonites for butchering. The last time I dropped some off I noticed a row of 4 or 5 cones nailed to some trees next to the lane. Its a pretty neat device and simple to make and use. It makes cutting the heads off a cleaner and safer operation, so I made one of my own.
Its just a coil of aluminum flashing riveted together. Stick the chicken in the funnel and pull its head out the bottom. Its quick and easy. Then, fling em out so they can flop around and drain the blood out. There are few things more satisfying than knowing that, when the economy collapses, we can process our own food.