https://animal-welfare-site-64148b.gitlab.io/aw672-039-pig-gestation-crate-evidence.html
Scientific Evidence Against Gestation Crates for Pigs | Animal Welfare Hub
The scientific evidence against gestation crates is overwhelming — they prevent natural behaviour, cause physical damage, and produce measurable chronic stress.
scientific evidencegestation cratesanimal welfarepigshub
https://econlife.com/2014/11/the-opportunity-cost-of-eliminating-pigs-gestation-crates/
The Opportunity Cost of Gestation Crates
Nov 16, 2014 - Economic reasoning that focuses on opportunity cost can be added to humane treatment in the list of reasons for eliminating pigs' gestation crates.
the opportunitygestation cratescost