Patrick,
OK, but remember you asked for more information on the lung sucking machines.
Here goes:
Live chickens are taken from cages and hung up side down (by their feet) on a moving conveyor. The conveyor takes the chickens to the beheading machine... think rotary razor blade from hell.
The beheaded chickens are then dunked in very hot water and move to a room with several rotating cylinders with rubber fingers on them to remove feathers.
Next is the gas flame to burn off and left over feathers.....nice aroma as you can imagine.
Finally we come to the Lung Sucker. It is a beast of a machine that attacks each bird and clamps on to the upper (open part) of the neck and then applies suction to remove the lungs from the birds. They are ejected into a large cart on wheels. (I don't what to know what happens to them).
After the lungs are removed the birds are ready for cutting and this is all a hand operation. Several people at stainless steel work stations will remove a bird from the line and will remove parts from the bird in a certain order by cutting off with very sharp knives. Unwanted parts are sent down a trough to who knows where.
The end result is chicken parts ready for freezing.
Don't ask if you really don't want to know. I saw this 30 years ago and I can still remember it very clearly.
The beef industry is similar but on a much larger scale.
Want to know about feed lots with 250,000 cows eating and pooping? You have never smelled anything like it.....
Most are over 2 miles square. That is a lot of poop to clean up. Think bulldozers all day.
Different strokes for different folks.