title: Tighter welfare regulations proposed for colony hens.
mesh_terms: D000822:Animal Husbandry / Q000331:legislation & jurisprudence*; D000827:Animal Welfare / Q000331:legislation & jurisprudence*; D000818:Animals; D002645:Chickens; D004739:England; D005260:Female; D006799:Housing, Animal / Q000331:legislation & jurisprudence