At the start of this year, Proposition 2—the landmark California ballot measure to end the extreme confinement of egg-laying hens, pregnant pigs and veal calves—went into effect.
Serial - All Animals 2009-15: Vol. 17:
4, Article 1.
Available at: https://www.wellbeingintlstudiesrepository.org/allanimals/vol17/iss4/1