title: Smothering in commercial free-range laying hens: a preliminary investigation.
authors.affiliation: FAI Farms Ltd, The Field Station, Wytham, Oxford, UK. ashleigh.bright@faifarms.co.uk
authors.forename: A
authors.initials: A
authors.lastname: Bright
authors.forename: E A
authors.initials: EA
authors.lastname: Johnson
mesh_terms: D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D001237:Asphyxia / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control / Q000662:veterinary*; D001522:Behavior, Animal; D002645:Chickens; D005260:Female; D015994:Incidence; D011201:Poultry Diseases / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D012307:Risk Factors