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Ranging Behaviour of Commercial Free-Range Broiler Chickens 2: Individual Variation
Contributor(s):: Peta S Taylor, Paul H Hemsworth, Peter J Groves, Sabine G Gebhardt-Henrich, Jean-Loup Rault
Little is known about broiler chicken ranging behaviour. Previous studies have monitored ranging behaviour at flock level but whether individual ranging behaviour varies within a flock is unknown. Using Radio Frequency Identification technology, we tracked 1200 individual ROSS 308 broiler...
Ranging Behaviour of Commercial Free-Range Broiler Chickens 1: Factors Related to Flock Variability
Little is known about the ranging behaviour of chickens. Understanding ranging behaviour is required to improve management and shed and range design to ensure optimal ranging opportunities. Using Radio Frequency Identification technology, we tracked 300 individual broiler chickens in each of four...
Behavioural consequences of visual deprivation occurring at hatch or in the early life of chickens
Contributor(s):: Hocking, P. M., Haldane, K. A., Davidson, E. M., Sandoe, P., Kristensen, H. H.
The development of behaviour in a line of chickens that are born sighted ( rdd) but turn blind after hatching was compared with a line that is blind at hatch ( beg) and with sighted White Leghorn controls (WL) to test the hypothesis that birds that become blind later in their life will show...
Effects of maternal vocalisations on the domestic chick stress response
Contributor(s):: Edgar, J., Kelland, I., Held, S., Paul, E., Nicol, C.
Although natural brooding is not commercially feasible, there is great potential to simulate aspects of maternal care to improve the welfare of farmed domestic chicks. Our previous studies showed that the presence of calm broody hens can buffer mild stress responses in chicks, although the...
Moral "lock-in" in responsible innovation: the ethical and social aspects of killing day-old chicks and its alternatives
Contributor(s):: Bruijnis, M. R. N., Blok, V., Stassen, E. N., Gremmen, H. G. J.
The aim of this paper is to provide a conceptual framework that will help in understanding and evaluating, along social and ethical lines, the issue of killing day-old male chicks and two alternative directions of responsible innovations to solve this issue. The following research questions are...
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...
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...
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 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...
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
Animal welfare issues in the poultry industry: is there a lesson to be learned? (Special issue: food animal husbandry and the new millennium)
Contributor(s):: Duncan, I. J. H.
Many of the conditions in which poultry live and the procedures to which they are subjected compromise their welfare. This article describes these welfare problems in the hope that they may serve as warnings to the rest of animal agriculture, which then might take steps to avoid the same...
Changes in substrate access did not affect early feather-pecking behavior in two strains of laying hen chicks
Contributor(s):: Dixon, L. M., Duncan, I. J. H.
Feather pecking, commonly found in flocks of laying hens (Gallus gallus), is detrimental to bird welfare. Thought to cause this problem is the normal housing of layers without a floor substrate. Some evidence suggests that early substrate access decreases later feather pecking. However, there has...
Effect of diet change on the behavior of chicks of an egg-laying strain
Contributor(s):: Dixon, G., Green, L. E., Nicol, C. J.
Injurious pecking has serious welfare consequences in flocks of hens kept for egg laying, especially when loose-housed. Frequent diet change is a significant risk for injurious pecking; how the mechanics of diet change influence pecking behavior is unknown. This study investigated the effect of...
Effects of induced molting on the well-being of egg-laying hens
Contributor(s):: McCowan, B., Schrader, J., DiLorenzo, A. M., Cardona, C., Klingborg, D.
Induced molting in egg-laying hens is an important method for maximizing hen egg production and quality as well as hen health in commercial settings; however, there is growing societal concern over its effects on hen well-being. Using individual hens as their own controls, this research examined...
Influence of stocking density on tonic immobility, lameness, and tibial dyschondroplasia in broilers
Contributor(s):: Sanotra, G. S., Lawson, L. G., Vestergaard, K. S.
This study assessed the effect of stocking density on the development of fear reaction (tonic immobility), lameness (gait), and tibial dyschondroplasia in broiler chicks of mixed sex. During 3 experiments, the study used 49 500 broiler chicks (Ross 208). Of these, 432 focal chicks were randomly...
Quantifying the shelter rabbit population: an analysis of Massachusetts and Rhode Island animal shelters
Contributor(s):: Cook, A. J., McCobb, E.
Scholarly work on the nonhuman animal shelter population has widely focused on cats and dogs. As a result, little is known about the population dynamics of domestic rabbits (Oryctolagus cuniculus) in shelters. The records from 4 companion animal shelters in Massachusetts and Rhode Island were...
Scientists' assessment of the impact of housing and management on animal welfare
A total of 22 scientists contributed to a consensus-oriented conceptual framework for assessment of farm animal welfare, addressing priority issues in cattle, pigs, and chickens. They used the Delphi method, in which participants contributed anonymously through e-mail. The framework puts welfare...