Bird

Balko, J. A., Lindemann, D. M., Allender, M. C. et al. 2019. Evaluation of the anesthetic and cardiorespiratory effects of intramuscular alfaxalone administration and isoflurane in budgerigars (Melopsittacus undulatus) and comparison with manual

OBJECTIVE To evaluate the anesthetic and cardiorespiratory effects of IM alfaxalone and isoflurane administration in budgerigars (Melopsittacus undulatus) and compare use of these agents with use of manual restraint. ANIMALS 42 healthy budgerigars. PROCEDURES For...

Jung, L., Knierim, U. 2019. Differences between feather pecking and non-feather pecking laying hen flocks regarding their compliance with recommendations for the prevention of feather pecking – A matched concurrent case-control design.

Feather pecking (FP) is a multifactorial problem in all housing systems. Using a case-control design we wanted to determine a set of variables which may be decisive for a flock to become case or control...

Koch, C. S., Ballantyne, K. C., Tynes, V. V. et al. 2017. Training Rhea americana chicks to walk voluntarily across a scale; effect on the handler's time and the chicks' weight gain compared with traditional techniques: A pilot study.

The purpose of this pilot study was to determine if Rhea americana chicks could be trained to walk voluntarily across a scale to be weighed. If the chicks were trainable, the following questions would be...

Fernandez, E. J., Kinley, R. C., Timberlake, W. 2019. Training penguins to interact with enrichment devices for lasting effects. Zoo Biology 38(6), 481-489.

The modern zoo has brought about two major advances in the behavioral welfare of their exhibited animals: (a) The use of environmental enrichment to promote naturalistic behaviors and (b) the use of training to improve...

Ross, M., Garland, A., Harlander-Matauschek, A. et al. 2019. Welfare-improving enrichments greatly reduce hens' startle responses, despite little change in judgment bias. Scientific Reports 9, 11881.

Responses to ambiguous and aversive stimuli (e.g. via tests of judgment bias and measures of startle amplitude) can indicate mammals’ affective states. We hypothesised that such findings generalize to birds, and that these two responses...

Correia de Lima Almeida Paz, I., Correia de Lima Almeida, I., Milbradt, E. L. et al. 2019. Effects of analgesic and noise stimulus in gait score assessment. PLOS ONE 14(1), e0208827.

This experiment was carried out aiming to assess walking manner and speed of broiler chickens with different gait scores (GS), with or without sound stimulus, and with or without administration of analgesic. To that end...

Nie, C., Ban, L., Ning, Z. et al. 2019. Feather colour affects the aggressive behaviour of chickens with the same genotype on the dominant white (I) locus. PLOS ONE 14(5), e0215921.

Aggression in chickens is a serious economic and animal welfare issue in poultry farming. Pigmentation traits have been documented to be associated with animal behaviour. Chicken pecking behaviour has been found to be related to...

Campderrich, I., Nazar, F. N., Wichman, A. 2019. Environmental complexity: A buffer against stress in the domestic chick. PLOS ONE 14(1), e0210270.

Birds kept in commercial production systems can be exposed to multiple stressors from early life and this alters the development of different morphological, immunological and behavioural indicators. We explore the hypothesis that provision of a...

Bracke, M. B. M., Koene, P., Estevez, I. et al. 2019. Broiler welfare trade-off: A semi-quantitative welfare assessment for optimised welfare improvement based on an expert survey. PLOS ONE 14(10), e0222955.

In order to support decision making on how to most effectively improve broiler welfare an innovative expert survey was conducted based on principles derived from semantic modelling. Twenty-seven experts, mainly broiler welfare scientists (n =...

Bertin, A., Mocz, F., Calandreau, L. et al. 2019. Human behaviour at the origin of maternal effects on offspring behaviour in laying hens (Gallus gallus domesticus). Physiology & Behavior 201, 175-183.

Regular visual presence of humans is known to reduce chickens' human-generated stress responses. Here we questioned whether, more than mere visual presence, human behaviour affects laying hen behaviour and subsequently their offspring's behaviour. We hypothesized...

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