Pig pen design — including space allocation, flooring type, environmental complexity, and group size — directly determines welfare outcomes in ways that building design decisions set for the production lifetime.
Pig pen design is a welfare decision with 20-year consequences. Unlike feeding protocols or enrichment programs that can be adjusted, building design determines the fundamental parameters of pig welfare for the production lifetime of the facility. Flooring type determines whether pigs develop foot problems; space allocation determines whether natural behaviors can be expressed; environmental complexity determines whether boredom-based stereotypies and injurious behaviors develop. Advocating for welfare-positive building standards when new facilities are planned — through planning regulations, lending criteria for farm loans, and welfare certification requirements — prevents decades of welfare compromise from being built into infrastructure.