Adaptational changes of behaviors in hens introduced to a multi-tier system

Cheon, Si Nae; Choi, Yang-Ho; Park, Kyu Hyun; Lee, Jun Yeob; Jeon, Jung-Hwan

doi:10.5187/jast.2020.62.2.276

Cited by 3 publications

(2 citation statements)

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“…Feather pecking may also be associated with negative affective states such as fear ( 34 ). Cheon et al ( 35 ) observed that pecking peaks occurred close to feeding time. No effect of time was observed in the present study, but the feed additives were able to decrease the pecking behavior, which indicates that the animals were less stressed.…”

Section: Discussionmentioning

confidence: 99%

Dietary supplementation with β-mannanase and probiotics as a strategy to improve laying hen's welfare

et al. 2022

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A trend toward animal welfare improvement is observed in animal production, in addition to restrictions imposed on the use of antimicrobials. This study's objective was to evaluate whether β-mannanase and probiotic supplementation can change hen's behavior. Light weight laying hens (36 weeks old) were housed in cages randomly allocated to one of four different treatments: control group, fed non-supplemented diets; diets supplemented with 300 g/ton of β-mannanase; diets supplemented with 50 g/ton of probiotic; or diets containing both 300 g/ton of β-mannanase and 50 g/ton of probiotic. The behavior of 24 birds was recorded for a week using video cameras. The frequency and time of main behaviors (eating, walking, standing, sitting, drinking, and exploring) were analyzed in three periods per day (from 09:00 to 09:15; from 01:00 to 01:15, and from 04:00 to 04:15), as well as the time of other behaviors (leg-stretching and wings, scratching, wing-flapping, aggressive and non-aggressive pecks). Frequency and lesion scores were also analyzed using a visual score of three body regions: neck, tail, and cloaca; as well as comb injuries. β-mannanase was able to increase the frequency of feeding behavior by 49% (P < 0.05) and hens also spend 20% (P < 0.05) more time in this behavior compared to the control treatment. The use of probiotics also enhanced by 39% (P < 0.05) the frequency and 19% the time (P < 0.05) and the supplementation with combined additives was able to increase by 29% (P < 0.05) the frequency and 25% (P < 0.05) the time in feeding behavior. β-mannanase and probiotics also increased the frequency and time spent exploring behavior (P < 0.05) and promoted a higher frequency in standing behavior (P < 0.05) and decreased the time spent on sitting behaviors (P < 0.05). The combined additives showed less frequency and time in sitting behaviors (P < 0.05), while increased wing-flapping behavior (P < 0.05). All the treatments were able to reduce pecking (P < 0.05). Therefore, the addition of β-mannanase and probiotics to laying hen diets is an effective strategy to improve bird welfare.

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Section: Discussionmentioning

confidence: 99%

Dietary supplementation with β-mannanase and probiotics as a strategy to improve laying hen's welfare

et al. 2022

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“…Annual feed consumption costs were calculated considering a feed consumption of 106 g/bird/day for the Conventional system and 130 g bird/day for the Cage-Free system. These figures were the mean values among the analyzed articles (Şekeroğlu et al, 2014;Kang et al, 2018;Guo et al, 2012;Cheon et al, 2020;Abdel-Azeem & Emeash, 2016) and lineage manuals (Hyline, 2016). The waste of 5 g/bird/day was added to total feed consumption (Hyline, 2016).…”

Section: Methodsmentioning

confidence: 99%

Economic Feasibility in Commercial Egg Production in a Conventional and Cage-Free Systems with Different Stocking Densities

Oliveira

Garcia

Burbarelli

et al. 2022

Braz. J. Poult. Sci.

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Adapting existing laying facilities to meet animal welfare certifications is not a simple task. It causes higher expenses to producers, who are often hesitant to accept the need for changes. Considerations of their financial situation make them insecure to make assertive decisions in this area, as they seek to maintain the economic efficiency of laying poultry. This study aims to analyze the economic viability of laying systems (conventional cages and Cage-Free) with different housing densities. The data source was a systematized literature review. Five articles were found containing reports on systems. Further data sources were the lineage handbook and a survey with companies specializing in poultry farming. An analysis of economic viability was performed in the multiple scenarios. Densities in each system were used to compose different scenarios: Conventional: 1,500 cm²/bird, 750 cm²/ bird, and 398 cm²/bird; and Cage-Free:7 birds/m² and 13 birds/m². The scenarios were evaluated in terms of Net Present Value, Internal Rate of Return, Modified Internal Rate of Return, Discounted Payback Method, Profitability Index, Equivalent Uniform Annual Value, and Monte Carlo Simulation. The best scenario was the Conventional, with 398 cm²/ bird, presenting a higher NPV. The Cage-Free system, with seven birds per square meter, had a lower NPV compared to conventional systems. All scenarios had satisfactory chances of success. The risks of negative or null financial return were low according to Monte Carlo simulations. Conventional and Cage-Free production are economically viable when using densities of 1,500 cm²/bird, 750 cm²/bird, or 398 cm²/bird (conventional), and 7 birds/m², or 13 birds/m² (Cage-Free).

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Impacts of access to legume- or grass-based pasture on behaviour, physiological responses and bacterial load of laying hens

Oke,

Onagbesan

2024

Heliyon

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Adaptational changes of behaviors in hens introduced to a multi-tier system

Cited by 3 publications

References 81 publications

Dietary supplementation with β-mannanase and probiotics as a strategy to improve laying hen's welfare

Dietary supplementation with β-mannanase and probiotics as a strategy to improve laying hen's welfare

Economic Feasibility in Commercial Egg Production in a Conventional and Cage-Free Systems with Different Stocking Densities

Impacts of access to legume- or grass-based pasture on behaviour, physiological responses and bacterial load of laying hens

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