Cassell, who ended up working on a chicken coop, synagogue, and football stadium addition all at the same time, conducted serious research and did a series of thought exercises to figure out how to approach the assignment. After examining a handful of approachesâ"What if Breuer created a poured-concrete coop? What happens if we create computer scripting to generate ideas?"âCassell and designer Ethan Feuer settled on a rustic, curved shelter of bent aluminum shinglesâan edgy, 60-square-foot avian Airstream.