We are not talking about happy sires and dams enjoying the life and fresh air of the countryside and bringing their healthy well bred offspring into a caring environment with plenty of room for exercise. We are talking the lifestyle of a battery hen with minimal care and veterinary attention bringing poorly bred pups into often badly maintained premises and sometimes never seeing the outside world or getting any human care and attention. Fresh air is available - coming through the broken windows and holes in the roof.
Hard to imagine - Have a look at these