Contributor(s):: Newnham, David
Behavioral changes and feathering score in heat stressed broiler chickens fed diets containing different levels of propolis
Contributor(s):: Mahmoud, U. T., Abdel-Rahman, M. A. M., Darwish, M. H. A., Applegate, T. J., Cheng, H.
This experiment was conducted to evaluate the effects of dietary supplementation of green Brazilian propolis on behavioral patterns and feather condition of heat stressed broiler chickens. Five hundred and four (504) male Ross 708 broiler chicks at 15-day old were randomly allotted to six dietary...
Effects of panels and perches on the behaviour of commercial slow-growing free-range meat chickens
Contributor(s):: Rodriguez-Aurrekoetxea, A., Leone, E. H., Estevez, I.
Environmental enrichment has the potential to benefit the welfare of farm animals. In poultry, panels and perches are two of the most commonly used forms of enrichment but few studies have determined their effects under commercial conditions. The aim of this work was to assess the impact of these...
Feed-restricted broiler breeders: state-dependent learning as a novel welfare assessment tool to evaluate their hunger state?
Contributor(s):: Buckley, L. A., Sandilands, V., Hocking, P. M., Tolkamp, B. J., D'Eath, R. B.
This paper reports three experiments that aimed to validate the use of state-dependent learning (SDL) as a novel welfare assessment tool to evaluate the hunger state of feed-restricted broiler breeders. In each experiment, birds alternated every 2 days between two food rations: quantitative feed...
Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens
Contributor(s):: Stratmann, A., Frohlich, E. K. F., Gebhardt-Henrich, S. G., Harlander-Matauschek, A., Wurbel, H., Toscano, M. J.
Non-cage housing systems for laying hens such as aviaries provide greater freedom to perform species-specific behavior and thus are thought to improve welfare of the birds; however, aviaries are associated with a high prevalence of keel bone damage (fractures and deviations), which is a major...
Willingness of Dutch broiler and pig farmers to convert to production systems with improved welfare
Contributor(s):: Gocsik, E., Lans, I. A. van der, Lansink, A. G. J. M. O., Saatkamp, H. W.
The present study investigated 15 broiler and 13 fattening pig farmers' willingness-to-convert to alternative production systems with higher animal welfare standards compared to conventional production systems in The Netherlands, and explored the main barriers to the adoption of these alternative...
New perspectives on urban cockfighting in Roman Britain
Contributor(s):: Doherty, Sean
Acute stress enhances sensitivity to a highly attractive food reward without affecting judgement bias in laying hens
Contributor(s):: Hernandez, C. E., Hinch, G., Lea, J., Ferguson, D., Lee, C.
Affective states can be evaluated by assessing shifts in the animal's expectation of a positive and negative outcome in response to ambiguous cues, also known as judgement bias (JB). The aim of this study was to use a JB methodology, using a go/go type of task where animals are required to make...
Broiler chicken welfare assessment in GLOBALGAP certified and non-certified farms in Brazil
Contributor(s):: Souza, A., Oliveira Sans, E. C. de, Muller, B. R., Molento, C. F. M.
Regarding broilers, Brazil is the third largest producer and the leading chicken meat exporter in the world. Independent certifications are required by some importers in the European Union (EU) to guarantee compliance with minimum welfare requirements. Our objective was to compare broiler chicken...
Development of early foraging behaviour of domestic chicks in varying social contexts
Contributor(s):: Gajdon, G. K., Mundwiler, B., Stauffacher, M.
Two aspects of foraging development might be crucial to learning in precocial chicks: what food particles look like and what food sites look like. Previous research indicates that there are innate dispositions for particle preferences and for preferring the type of food sites experienced between...
Plumage damage in free-range laying hens: behavioural characteristics in the rearing period and the effects of environmental enrichment and beak-trimming
Contributor(s):: Hartcher, K. M., Tran, M. K. T. N., Wilkinson, S. J., Hemsworth, P. H., Thomson, P. C., Cronin, G. M.
Severe feather-pecking, whereby birds peck at and pull out the feathers of other birds, is one of the greatest welfare concerns and the most prevalent behavioural problem in laying hens. It can be extremely difficult to control, especially in non-cage laying flocks. Despite a multitude of studies...
The relevance of variations in group size and phenotypic appearance on the behaviour and movement patterns of young domestic fowl
Contributor(s):: Liste, G., Campderrich, I., Beltran Heredia, I. de, Estevez, I.
Variations in the group size of laying hens might increase the risk of undesired behaviours with important consequences for the birds' health and welfare. However, larger groups housed at constant densities also translate into larger enclosures that may increase space efficiency, therefore...
The risk factors affecting the development of vent pecking and cannibalism in free-range and organic laying hens
Contributor(s):: Lambton, S. L., Knowles, T. G., Yorke, C., Nicol, C. J.
Injurious pecking remains one of the biggest animal welfare and economic challenges for free-range egg producers. This prospective epidemiological study investigated the development of vent pecking (VP) and cannibalism on 62 free-range and organic UK farms (119 flocks). Flocks were visited at 25...
The ticking clock: addressing farm animal welfare in emerging countries
Contributor(s):: Keyserlingk, M. A. G. von, Hotzel, M. J.
Over the last decade many emerging economies, and in particular Brazil, have established themselves as major players in global food animal production. Within these countries much of the increase in food animal production has been achieved by the adoption of intensive housing systems similar to...
Stakeholder attitudes toward farm animal welfare
Contributor(s):: Heleski, C. R., Mertig, A. G., Zanella, A. J.
We developed a survey to measure attitudes toward farm animal welfare, then targeted two US groups considered highly influential in this area: veterinary college faculty members with large animal/food animal emphasis (VCF) and animal science faculty members (ANS). The survey was conducted via...
Tales about tails: is the mutilation of animals justifiable in their best interests or in ours?
Contributor(s):: Edwards, S., Bennett, P., Appleby, M. C., Weary, D. M., Sandoe, P.
Tail docking, involving surgical or non-surgical removal of a portion of the tail, is one of the most widely carried out and contentious mutilations inflicted by humans on animals. To differing extents, this procedure is carried out on farm livestock, draught animals and companion animals. The...
Killing of spent laying hens using CO 2 in poultry barns
Contributor(s):: Berg, C., Yngvesson, J., Nimmermark, S., Sandstrom, V., Algers, B.
In Sweden, laying hens are killed using the following methods: (i) traditional slaughter; (ii) on-farm with CO 2 in a mobile container combined with a grinder; or (iii) with CO 2 inside the barn. The number of hens killed using the latter method has increased. During these killings a veterinarian...
Welfare Quality parameters do not always reflect hen behaviour across the lay cycle in non-cage laying hens
Contributor(s):: Daigle, C., Siegford, J.
The integration of outcome-based measurements to animal welfare assessment programmes can provide a new perspective on the individual animal's experience. Identifying variability in individual experiences can facilitate understanding of animals at the periphery of the welfare spectrum, compared...
Backyard poultry raising in Bangladesh: a valued resource for the villagers and a setting for zoonotic transmission of avian influenza. A qualitative study
Contributor(s):: Sultana, R., Nahar, N., Rimi, N. A., Azad, S., Islam, M. S., Gurley, E. S., Luby, S. P.
Poultry as a host for the zoonotic pathogen Campylobacter jejuni
Contributor(s):: Hermans, David, Pasmans, Frank, Messens, Winy, Martel, An, Van Immerseel, Filip, Rasschaert, Geertrui, Heyndrickx, Marc, Van Deun, Kim, Haesebrouck, Freddy