Behavioral and hematological responses of broiler chickens administered with betaine and ascorbic acid during hot-dry season
Contributor(s):: Egbuniwe, Ifeanyichukwu C., Ayo, Joseph O., Kawu, Mohammed U., Mohammed, Aliyu
Heat stress is a major problem in poultry production in tropical regions. Assessing the impact of thermally stressful environmental conditions on the welfare of broiler chickens is of great importance. Behavioral responses in a novel environment and hematology of broiler chickens administered...
Effects of carprofen, meloxicam and butorphanol on broiler chickens' performance in mobility tests
Contributor(s):: Hothersall, B., Caplen, G., Parker, R., Nicol, C. J., Waterman-Pearson, A. E., Weeks, C. A., Murrell, J. C.
Lame broiler chickens perform poorly in standardised mobility tests and have nociceptive thresholds that differ from those of non-lame birds, even when confounding factors such as differences in bodyweight are accounted for. This study investigated whether these altered responses could be due to...
The contribution of broiler chicken welfare certification at farm level to enhancing overall animal welfare: the case of Brazil
Contributor(s):: Souza, A. P. O., Molento, C. F. M.
The intensification of farm animal welfare debate has led to an increasing number of certification schemes covering this issue; however, there are concerns about the contribution of these schemes in improving welfare. The aims of this study were to identify certification schemes for broiler...
Effects of catching and transportation versus pre-slaughter handling at the abattoir on the prevalence of wing fractures in broilers
Contributor(s):: Kittelsen, K. E., Granquist, E. G., Vasdal, G., Tolo, E., Moe, R. O.
Fractures occurring in conscious broiler chickens are painful and severely compromise animal welfare. The aim of this study was to investigate the effects of pre-slaughter handling procedures on the frequency of wing fractures. Wings were examined for fractures in 11,609 broilers, from 12...
Slow and steady wins the race? No signs of reduced welfare in smaller broiler breeder hens at four weeks of age
Contributor(s):: Lindholm, C., Calais, A., Jonsson, J., Yngwe, N., Berndtson, E., Hult, E., Altimiras, J.
Broiler breeder chickens are commonly reared under strict feed-restriction regimes to reduce obesity-induced health and fertility problems during adult life, and are assumed to experience a reduced welfare due to the resulting hunger. In these conditions, feed competition could influence the...
Effects of different dietary protein levels during rearing and different dietary energy levels during lay on behaviour and feather cover in broiler breeder females
Contributor(s):: Emous, R. A. van, Kwakkel, R., Krimpen, M. van, Hendriks, W.
An experiment was conducted to determine the effects of different dietary protein levels during rearing and different dietary energy levels during lay on behaviour and feather cover in broiler breeder females. A 2*3*2 factorial arrangement of treatments was used. A total of 2880 Ross 308...
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...
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...
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...
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...
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...
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...
Simple cannulation procedure for serial blood sampling through cutaneous ulnar vein in chickens
Contributor(s):: Bayer, D. M., Mohan, K., Jayakumar, K., Manafi, M., Pavithra, B. H.
The objective of the study was to collect repeated, low-stress blood samples from the ulnar vein of chickens required for pharmacokinetic studies or hormonal assays. The study used 5 apparently healthy, unsexed, commercial broiler chickens about 6 weeks old and weighing 1.7-1.9 kg for serial...
Using conjoint analysis to weight broiler welfare variables based on slaughterhouse data
Contributor(s):: Tuunainen, P., Valaja, J., Valkonen, E., Hepola, H.
The Council of the European Union adopted the welfare directive for broiler chickens in 2007 (Commission of the European Communities, 2007). The directive defines minimum demands and objectives for broiler production ranging from stocking density to welfare. This study found that the level of...
Lameness is consistently better at predicting broiler chicken performance in mobility tests than other broiler characteristics
Contributor(s):: Caplen, G., Hothersall, B., Nicol, C. J., Parker, R. M. A., Waterman-Pearson, A. E., Weeks, C. A., Murrell, J. C.
To determine whether lame broilers are in pain it is necessary to compare measures of lameness and mobility before and after analgesic treatment. Such measures should not be unduly affected by other bird characteristics. This study assessed the performance of lame (gait score, GS 3-4) and...
The effect of pre-stun shocks in electrical water-bath stunners on carcase and meat quality in broilers
Contributor(s):: Rao, M. A., Knowles, T. G., Wotton, S. B.
Cruelty and legislation
Contributor(s):: Harrison, R.
Breeding for better welfare: genetic goals for broiler chickens and their parents
Contributor(s):: Dawkins, M. S., Layton, R.
Improving the poultry shackle line
Contributor(s):: Lines, J. A., Berry, P., Cook, P., Schofield, C. P., Knowles, T. G.
Is the mechanisation of catching broilers a welfare improvement?
Contributor(s):: Delezie, E., Lips, D., Lips, R., Decuypere, E.