Ed, did you fall asleep in one of those controlled atmosphere trailers?
USDA allows 2sq ft/ bird. Driven birds are free range on the estates.
Every bird you shoot at has several sets of eyes watching it fly.
Injured birds are immediately collected and dispatched. Often by Hallal method.
The birds are crowned, and packaged for sale.
There are not dozens of carcasses littering the estates like there might be on an American game preserve. Primarily due to terrain and predator suppression.
Your imagination is way off base on this.
