Provision of Additional Cup Drinkers Mildly Alleviated Moderate Heat Stress Conditions in Broiler Chickens
Contributor(s):: Iyasere, Oluwaseun S., Bateson, Melissa, Beard, Andrew P., Guy, Jonathan H.
Assessment of mobility and pain in broiler chickens with identifiable gait defects
Contributor(s):: Tahamtani, Fernanda M., Herskin, Mette S., Foldager, Leslie, Murrell, Jo, Sandercock, Dale A., Riber, Anja B.
Optical flow, behaviour and broiler chicken welfare in the UK and Switzerland
Contributor(s):: Dawkins, Marian Stamp, Wang, Lawrence, Ellwood, Stephen A., Roberts, Stephen J., Gebhardt-Henrich, Sabine G.
Feather Pecking and Cannibalism in Non-Beak-Trimmed Laying Hen Flocks—Farmers' Perspectives
| Contributor(s):: Eija Kaukonen, Anna Valros
Pecking-related problems are common in intensive egg production, compromising hen welfare, causing farmers economic losses and negatively affecting sustainability. These problems are often controlled by beak trimming, which in Finland is prohibited. An online questionnaire aimed to collect...
Rewarding memories? Behaviour of broiler chickens towards peat in flocks with and without previous exposure to peat
| Contributor(s):: Vas, Judit, BenSassi, Neila, Vasdal, Guro, Newberry, Ruth C.
Under commercial conditions, environmental provisions assumed to have an enriching effect on broiler chicken welfare may be offered infrequently and at limited locations, raising questions about their enrichment value. We hypothesized that, if broilers given limited access to peat remembered peat...
Play behaviour reduced by environmental enrichment in fast-growing broiler chickens
| Contributor(s):: Liu, Zhenzhen, Torrey, Stephanie, Newberry, Ruth C., Widowski, Tina
The objective of this study was to evaluate effects of environmental enrichment on play behaviour in fast-growing broiler chickens. Chicks (19 of each sex) were randomly assigned to 6 non-enriched (NE) pens and 6 pens enriched (E) with a raised platform, hanging weighing scale, peck stone, and...
Breed-related differences in the preference for inanimate objects between chicks of laying hens
| Contributor(s):: Kasperek, Kornel, Zięba, Grzegorz, Pluta, Adrian, Ziemiańska, Agnieszka, Rozempolska-Rucińska, Iwona
Our previous study showed significant behavioural differences between breeds of laying hens. Birds differed in their excitability, reactivity, decision-making speed, behavioural strategy, and interest in elements of the surroundings. The results of our investigations and studies conducted by...
Range use is related to free-range broiler chickens’ behavioral responses during food and social conditioned place preference tests
| Contributor(s):: Ferreira, Vitor Hugo Bessa, Germain, Karine, Calandreau, Ludovic, Guesdon, Vanessa
Free-range broiler chickens usually show an uneven spatial utilization of an outdoor range. Due to behavioral and cognitive between-individual differences, some animals may be driven to associate food and conspecifics more strongly to the barn, causing them to be less prone to explore the range....
Effects of environmental enrichment on activity and lameness in commercial broiler production
| Contributor(s):: Vasdal, Guro, Vas, Judit, Newberry, Ruth C., Moe, Randi Oppermann
The aim of this pilot study was to investigate the effects of commercially applied environmental enrichments on behavior and lameness in broilers. Two consecutive flocks of broilers were observed at 16 days and 30 days of age to investigate differences between enriched (peat, bales of lucerne...
Sward botanical composition and sward quality affect the foraging behaviour of free-range laying hens
| Contributor(s):: Breitsameter, Laura, Gauly, Matthias, Isselstein, Johannes
In a two-year experiment, we investigated the influence of sward plant species composition (sward type), stocking duration and state of sward degradation on the foraging behaviour of chickens. Laying hens (ISA Warren) were pastured on 15 sward types including 14 monocultures of grassland plant...
Natural incubation patterns and the effects of exposing eggs to light at various times during incubation on post-hatch fear and stress responses in broiler (meat) chickens
| Contributor(s):: Archer, Gregory S., Mench, Joy A.
Although environmental conditions during incubation can affect poultry welfare, one factor often overlooked in the commercial incubation of eggs is light. Light stimulation during embryonic development is now known to affect the physiology and behavior of broiler (meat) chickens post-hatch, but...
In search of the behavioural correlates of optical flow patterns in the automated assessment of broiler chicken welfare
| Contributor(s):: Dawkins, Marian Stamp, Cain, Russell, Merelie, Kathryn, Roberts, Stephen J.
Assessment of chicken welfare using camera surveillance of behaviour has great potential as a supplement to good stockmanship and as an aid to improving flock management. Suitable cameras are now readily available and the automated analysis of the lengthy video sequences from the cameras can be...
Environmental complexity and use of space in slow growing free range chickens
| Contributor(s):: Rodriguez-Aurrekoetxea, Ane, Leone, Erin Hoerl, Estevez, Inma
Production environments for meat poultry are generally bi-dimensional open areas where birds tend to cluster along the walls. We investigated the impact of increasing environmental complexity (EC) on slow-growing free-range chickens raised under commercial conditions. The study was conducted in...
Disrupting motivational sequences in chicks: Are there affective consequences?
| Contributor(s):: Seehuus, Birgitte, Mendl, Mike, Keeling, Linda J., Blokhuis, Harry
The ‘reward cycle’ conceptualises reward acquisition as a cyclic phenomenon divided into three motivational stages with related emotional or affective states. For feeding behaviour such a cycle consists of an appetitive stage characterised by foraging and exploration linked to emotions such as...
Comparison of the tonic immobility duration, heterophil to lymphocyte ratio, and fluctuating asymmetry of chicks reared with or without a broody hen, and of broody and non-broody hens
| Contributor(s):: Campo, José Luis, Dávila, Sara García, Gil, María García
The purposes of this study were to determine whether rearing with a broody hen influenced duration of tonic immobility, heterophil to lymphocyte ratio, and relative fluctuating asymmetry of chicks and to analyze the differences between broody and non-broody hens in fear and stress indicators. A...
Pain issues in poultry
| Contributor(s):: Gentle, Michael J.
This review highlights the possible pain experienced by layer and broiler poultry in modern husbandry conditions. Receptors which respond to noxous stimulation (nociceptors) have been identified and physiologically characterised in many different part of the body of the chicken including the...
Neighbourhood analysis as an indicator of spatial requirements of broiler chickens
| Contributor(s):: Buijs, Stephanie, Keeling, Linda J., Vangestel, Carl, Baert, Jeroen, Tuyttens, Frank A. M.
The appropriate stocking density for broiler chickens is a much discussed topic in animal welfare. To determine at which stocking density the level of crowding becomes aversive to 4–6-week-old broiler chickens, spatial distribution and behaviour of groups stocked at 8, 19, 29, 40, 45, 51, 61 or...
Mild environmental aversion is detected by a discrete-choice preference testing method but not by a free-access method
| Contributor(s):: Browne, William J., Caplen, Gina, Statham, Poppy, Nicol, Christine J.
Preference tests are a widely used method in animal welfare science but the influence of specific methodologies has not been widely investigated, and methods are often selected arbitrarily. In these experiments we assessed the environmental preferences of 72 individual laying hens, where...
Laying hens selected for low mortality: Behaviour in tests of fearfulness, anxiety and cognition
| Contributor(s):: Nordquist, Rebecca E., Heerkens, Jasper L. T., Rodenburg, T. Bas, Boks, Sabine, Ellen, Esther D., van der Staay, F. Josef
Feather pecking and cannibalism in chickens can lead to injury or to death of the victims, and is thus a serious welfare and economic issue in modern poultry farming. A sib selection scheme has been initiated to genetically select a low mortality line (LML), which shows decreased mortality due to...
Investigating the importance of vision in poultry: Comparing the behaviour of blind and sighted chickens
| Contributor(s):: Collins, Sophie, Forkman, Björn, Kristensen, Helle H., Sandøe, Peter, Hocking, Paul M.
Behaviour in poultry is predominately visually mediated and vision is important to the welfare of poultry. The relationship between vision, behaviour and welfare has primarily been investigated in relation to artificial lighting. Genetically blind chickens provide an alternative experimental...