References
- APPLEBY, M.C. (1990) Behaviour of laying hens in cages with nest sites. British Poultry Science in press
- APPLEBY, M.C., DUNCAN, E.T. and HUGHES, B.O. (1990) Effects of perches in battery cages on production and welfare of laying hens. British Poultry Science in press
- DAWKINS, M.S. (1983) Battery hens name their price: consumer demand theory and the measurement of ethological ‘needs’. Animal Behaviour 31: 1195–1205.
- FARM ANIMAL WELFARE COUNCIL (1986) An Assessment of Egg Production Systems. FAWC, Tolworth
- FARM ANIMAL WELFARE COUNCIL (1988) Report on Priorities in Animal Welfare Research and Development. FAWC, Tolworth
- HUGHES, B.O. and APPLEBY, M.C. (1989) Increase of bone strength of spent laying hens housed in modified cages with perches. Veterinary Record 124: 483–484.
- ROBERTSON, E.S., APPLEBY, M.C., HOGARTH, G.S. and HUGHES, B.O. (1989) Modified cages for laying hens: a pilot trial. Research and Development in Agriculture in press
- VESTERGAARD, K. (1980) The regulation of dustbathing and other behaviour patterns in the laying hen: a Lorenzian approach. In: Moss, R. (Ed.) The Laying Hen and its Environment. Martinus Nijhoff, The Hague, pp. 101–113.