With a population of over 30 million, the Spanish pig sector has established itself as the largest producer of live pigs in the European Union. In 2020 , the number of animals sent to the slaughterhouse is expected to exceed that of Germany , which currently ranks first. In July 2019, a slaughterhouse and the largest pig cutting plant in Europe began its activity in Binéfar, in the province of Huesca .

"Under the relentless rhythm of production, animals suffer systematic exploitation and institutional neglect", are the words of Aitor Garmendia, photographer behind the project "Behind the walls", who has published new research after accessing 32 pig farms located in Castilla y León, Aragon and Castilla-La Mancha