Other chickens walk around the bale browsing around the edges of the bale, and eating the alfalfa flakes that get scratched off onto the ground by the upper chickens. Alfalfa is a very nutritious food crop. Alfalfa sends it's roots deep into the soil.
Soil or Waste Stacks. A soil or waste stack (normally just called a stack) is a drainage pipe that passes through at least one story(floor to ceiling) as a drain pipe, this also includes any horizontal offsets. Every soil or waste stack will terminate in a stack vent that leads to outside air or a vent header.
Short stack. A short stack is a stack of chips that is much smaller (in currency units, not the number of chips) than the others at the table. The term short stack may also be used in adjective form, as in Mary is short-stacked at the table. The opposite of a short stack is a deep stack.