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Behavioural and Nutritional Management of Non-Beak Treated Hens Housed in Furnished Cages

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dc.contributor.advisor Widowski, Tina
dc.contributor.advisor Sandilands, Victoria Morrissey, Krysta 2017-03-22T18:20:11Z 2017-03-22T18:20:11Z 2017-03 2017-02-03 2017-03-22
dc.description.abstract This thesis is an investigation of how to manage flocks of non-beak treated laying hens without increasing damage and mortality due to injurious pecking. Three studies, outlined in four chapters, assessed the effects of breed, beak treatment, extra enrichments, and dietary alterations on mortality, behaviour, feather condition, beak shape, and production parameters. In the first study, it was demonstrated that breed affected mortality, bird-to-bird pecking, feather damage, and enrichment use (i.e. Lohmann Classic Brown > Hyline Brown). Hens with intact beaks had more feather damage, caused more damage to the extra enrichments, and had longer upper mandibles. In the second study, dietary alterations affected both behaviour and production parameters. Hens fed animal protein laid more eggs with brown spots, laid lighter eggs, had higher excreta dry matter content, and caused more damage to the extra enrichments than hens fed a purely plant based diet. Hens fed a high fibre diet required a larger volume of feed, laid fewer dirty and/or bloody eggs, had higher excreta dry matter content, and performed fewer spot pecks near the end of the study than hens fed a diet with a standard level of fibre. In the third study, breed affected upper mandible length and beak tip angle (i.e. Columbian Rocks had longer and sharper beaks). The use of extra enrichments was carried out over all three experiments and overall the results were encouraging. Hens with extra enrichments performed less bird-to-bird and spot pecking, had less feather damage, tended to have shorter beaks (cuttlebones only), and tended to have blunter beak tips (with increased cuttlebone use), but had fewer ‘good’ quality eggs. en_US
dc.description.sponsorship Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), SRUC International Engagement Grant, Rural and Environment Science and Analytical Services (RESAS), WPSA-UK Branch en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject behaviour en_US
dc.subject laying hen en_US
dc.subject beak treatment en_US
dc.subject beak trimming en_US
dc.subject enrichment en_US
dc.subject animal protein en_US
dc.subject extra fibre en_US
dc.subject furnished cage en_US
dc.subject cuttlebone en_US
dc.subject poultry en_US
dc.subject welfare en_US
dc.title Behavioural and Nutritional Management of Non-Beak Treated Hens Housed in Furnished Cages en_US
dc.type Thesis en_US Animal and Poultry Science en_US Doctor of Philosophy en_US Department of Animal Biosciences en_US
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada