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  1. 'Animal Ethics Dilemma': an interactive learning tool for university and professional training

    Contributor(s):: Hanlon, A. J., Algers, A., Dich, T., Hansen, T., Loor, H., Sandoe, P.

    'Animal Ethics Dilemma' is a freely available computer-supported learning tool ( or which has been developed primarily for veterinary undergraduates but is applicable also to students in other fields of animal science. The objectives of the computer...

  2. A 'pebble test of anxiety' did not differentiate between Japanese quail divergently selected for stress and fear

    Contributor(s):: Jones, R. B., Marin, R. H., Satterlee, D. G.

    It has been suggested that the time taken by an individually tested domestic chick to begin pecking at pebbles on the floor of a novel arena might be used as a test of fear and anxiety, with low latencies to peck indicating low fear and vice versa, and as a potential selection criterion 'to...

  3. A brief report on aggressive interactions within and between groups of domestic turkeys ( Meleagris gallopavo )

    Contributor(s):: Buchwalder, T., Huber-Eicher, B.

    Aggressive encounters and injuries due to head pecking seriously threaten the welfare of domestic turkeys and also result in economic waste within the turkey industry. The aim of this study was to investigate whether domestic turkey toms distinguish group members from non-group members and if...

  4. A comparison between leg problems in Danish and Swedish broiler production

    Contributor(s):: Sanotra, G. S., Berg, C., Lund, J. D.

    In Denmark and Sweden, surveys were undertaken to estimate the prevalence of leg problems in conventional broiler production. The Danish survey included 28 Ross 208 flocks, and the Swedish survey included 15 Ross 208 and 16 Cobb flocks. Leg problems included reduced walking ability (gait), tibial...

  5. A comparison of the behaviour and production of laying hens in experimental and conventional battery cages

    Contributor(s):: Bareham, J. R.

    In a small-scale study an experimental cage was tested for its effect on behaviour, production, and feather and foot damage in groups of six birds per cage. The experimental cages, when compared with conventional types, had a horizontal floor, were extended in height, had food and water provided...

  6. A comparison of the behaviour of domestic chicks reared with or without a hen in enriched pens

    Contributor(s):: Roden, C., Wechsler, B.

    The presence of a hen and the incidence of feather pecking in laying hen chicks (white 'Lohman Selected Leghorn' hybrids) was investigated. Groups of 8 chicks were reared with a hen (5 groups) or without a hen (7 groups) in enriched pens over the first 8 weeks after hatching. There was a...

  7. A continuous-choice assessment of the domestic fowl's aversion to concurrent transport stressors

    Contributor(s):: MacCaluim, J. M., Abeyesinghe, S. M., White, R. P., Wathes, C. M.

    Characterization of the effect of transport on the welfare of fowl requires common currency methods that can compare the effects of diverse stressors using the same unit of measure. Aversion of broiler chickens (aged 42+or-1 days) to vibrational and thermal stressors was investigated in a...

  8. A critical review of electrical water-bath stun systems for poultry slaughter and recent developments in alternative technologies

    Contributor(s):: Shields, S. J., Raj, A. B. M.

    Prior to slaughter, most farmed birds move through a constant-voltage, multiple-bird, electrical water-bath stun system. Using this system subjects live birds to stressful and painful shackling, and the potential exists for them to receive prestun electric shocks and induction of seizures while...

  9. A cross-sectional study of the prevalence of vent pecking in laying hens in alternative systems and its associations with feather pecking, management and disease

    Contributor(s):: Potzsch, C. J., Lewis, K., Nicol, C. J., Green, L. E.

    The aim of this cross-sectional study was to investigate associations between vent pecking (VP) and management in laying hens in alternative systems and to compare the results with those from the feather pecking (FP) analysis using data collected in the same study. The data were derived from a...

  10. A descriptive account of the pre-laying behaviour of hens housed individually in modified cages

    Contributor(s):: Sherwin, C. M., Nicol, C. J.

    Because incorporating nests into modified cages for laying hens might overcome some of the welfare concerns about conventional cages, the pre-laying behaviour of 24 hens housed singly in modified cages, each containing 2 nests was studied and compared with pre-laying behaviour reported previously...

  11. A method for measuring the aversiveness of sounds to domestic hens

    Contributor(s):: McAdie, T. M., Foster, T. M., Temple, W., Matthews, L. R.

    Six hens' key-pecking at each of 2 simultaneously available perspex discs (keys) was maintained by intermittent access to wheat. Over a series of conditions one of 4 sounds (music, water-hose, poultry and train), at a range of decibel levels (90-100 dB(A)) was relayed to the experimental chamber...

  12. A method for the economic valuation of animal welfare benefits using a single welfare score

    Contributor(s):: Bennett, R., Kehlbacher, A., Balcombe, K.

  13. A non-intrusive method of assessing plumage condition in commercial flocks of laying hens

    Contributor(s):: Bright, A., Jones, T. A., Dawkins, M. S.

  14. A note on aggression and cannibalism in laying hens following re-housing and re-grouping

    Contributor(s):: Cloutier, S., Newberry, R. C.

    The effects of being moved and mixed with strangers on the incidence of aggression and cannibalism in caged White Leghorn hens with intact beaks were examined. It was predicted that mixing of strangers would increase rates of aggression and cannibalism. Hens were reared in 16 stable groups of...

  15. A note on behaviour of poultry exposed to increasing carbon dioxide concentrations

    Contributor(s):: Gerritzen, M., Lambooij, B., Reimert, H., Stegeman, A., Spruijt, B.

    Killing poultry by means of whole house gassing with carbon dioxide (CO2) is an important tool in disease control. The behaviour of ducks, broilers, laying hens and turkeys was observed to assess differences in susceptibility between species and to assess animal welfare implications following...

  16. A note on behavioural responses of farm animals to ultrasound

    Contributor(s):: Algers, B.

    Horses, cattle, swine, sheep and poultry all reacted to ultrasound from a device used to clear rats from buildings. Most animals were drawn towards the sound at first and then turned away and kept their ears pointing away from the sound. Poultry showed the least reaction. The device is considered...

  17. A note on contrafreeloading in broilers compared to layer chicks

    Contributor(s):: Lindqvist, C., Zimmerman, P., Jensen, P.

    Contrafreeloading (CFL) is the behaviour where an animal chooses to work for food even when identical food can be obtained without any effort. Previous studies have suggested that the difference in CFL between White Leghorn layers and jungle fowl may be a side effect of selection for increased...

  18. A note on fear reaction of three different genetic strains of laying hens to a simulated hawk attack in the hen run of a free-range system

    Contributor(s):: Zeltner, E., Hirt, H.

    Hens well adapted to free-range systems should react quickly to avoid an attack by a predator but should also be able to return to the hen run soon after to ensure good use of the outside area. To ascertain if some strains cope better with a frightening event the fear reaction of three different...

  19. A note on light preference in layer pullets reared in incandescent or natural light

    Contributor(s):: Gunnarsson, S., Heikkila, M., Hultgren, J., Valros, A.

    The effect of early exposure of pullets to natural light may have an effect on the later preference for light type and on the behaviour of birds after being transferred to laying facilities. Our aim was to study the light-type preference of 14-week pullets reared in either incandescent or natural...

  20. A note on social dominance and learning ability in the domestic chicken ( Gallus gallus )

    Contributor(s):: Croney, C. C., Prince-Kelly, N., Meller, C. L.

    Relatively little is known about the relationship between social behavior and specific cognitive abilities of the chicken. It is uncertain whether dominant birds have a cognitive advantage over subordinate birds that might facilitate their superior position in the social hierarchy. Likewise, it...