Nutrition, feeding and laying hen welfare

Bryden, W. L.; Li, X.; Ruhnke, Isabelle; Zhang, D.; Shini, S.

doi:10.1071/an20396

Cited by 37 publications

(37 citation statements)

References 200 publications

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“…In particular, on the diet of the hens in different types of creation, compared to the feed commonly used in conventional cage creation, organic farming (and in cagefree farming) favors the predominant consumption of grass from external areas, which provides high amounts of fiber, tocopherol, carotenoids and flavonoids (20), allowing a remarkable transfer of bioactive substances that could confer higher nutritional quality to the organic egg compared to the conventional egg. In addition, it has also been shown that cage-free housing and the guarantee of adequate outdoor space for the animal behavior of all livestock ensures that laying hens can move freely during some hours of the day and, consequently, are less stressed (37). It is understandable that the result of this set of measures based on sustainability, high-quality animal nutrition, and animal welfare results in a feed that generates a lower environmental footprint (38,39) and, above all, a higher nutritional density (6) compared to conventional egg production.…”

Section: Discussionmentioning

confidence: 99%

Organic Egg Consumption: A Systematic Review of Aspects Related to Human Health

Mesas

Fernández‐Rodríguez²,

Martínez‐Vizcaíno³

et al. 2022

Front. Nutr.

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Consumption of organic foods has increased recently, but evidence about their potential health benefits is still limited. This systematic review aims to synthesize the available scientific evidence on the association between organic egg consumption and human health. We searched for peer-reviewed articles on this subject indexed in the MEDLINE, EMBASE, Web of Science and Cochrane Library databases from the inception date to April 13, 2022. This review was based on PRISMA guideline recommendations. Three studies on organic egg consumption in humans were included. After 8 weeks of consuming organic eggs, one randomized crossover trial found that participants had higher serum concentrations of the beta-carotene lutein compared to the period without consuming organic eggs. Moreover, in a cross-sectional study with nationally representative data from Americans over the age of 50, it was found that consumption of organic eggs was associated with lower levels of the inflammatory markers C-reactive protein and cystine C compared with conventional eggs. Finally, in a cohort of children aged 0 to 2 years, no significant association was observed between consuming organic eggs and the risk of eczema. In conclusion, the evidence about the potential benefits of organic egg consumption and human health is promising but still requires further research. A human research agenda is proposed based on laboratory studies pointing out that organic eggs have a more desirable nutritional profile than conventional eggs.

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Section: Discussionmentioning

confidence: 99%

Organic Egg Consumption: A Systematic Review of Aspects Related to Human Health

Mesas

Fernández‐Rodríguez²,

Martínez‐Vizcaíno³

et al. 2022

Front. Nutr.

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“…Furthermore, eggs of hen breeds with the highest mineral content might highly influence the physiological functions of bones and teeth (Ca), transportation of oxygen (Fe), immunity maintenance (lutein and zeaxanthin nutrients), metabolic activities, DNA construction, and maintenance (Zn) of consumers from that egg breeds [47] [48]. Presumably, the difference in ash content might be attributed to the variation in the genetic sensitivity response of breeds that drank saline drinking water [49]. A significantly (P ≤ 0.01) highest egg crude fiber content was confirmed for KK (1.63 ± 0.11), higher for CH (1.44 ± 0.07) breeds, whereas the lowest egg crude fiber content was observed for HC (1.36 ± 0.05), C (1.33 ± 0.05), L (1.29 ± 0.01) and H (1.25 ± 0.05) breed eggs.…”

Section: Nutritional Composition Of Eggs Of Different Chicken Genotypesmentioning

confidence: 99%

“…The crude ash content from breeds had a positive significant correlation with crude fiber (r = 0.970; P < 0.01. The direct association of crude ash content and fat accumulation might be attributed to the physiological response of eggs from breeds drunk saline drinking water [49].…”

Section: External and Internal Egg Qualitymentioning

confidence: 99%

Sensory Characteristics, Nutritional Composition, and Quality of Eggs from Different Chickens

Hailemariam¹,

Esatu²,

Abegaz³

et al. 2022

OJAS

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The present study evaluated the sensory, composition, and quality of eggs from Cosmopolitan (C), Improved Horro (H), ♂ Improved Horro * Cosmopolitan ♀ (HC), ♂ Cosmopolitan * Improved Horro ♀ (CH), Indigenous(L), and Koekoek (KK) genotypes. A completely randomized design was used in the study. A total of 108 (18/genotype), 180 (30/genotype), and 90 (15/genotype) eggs were used for the sensory, composition, and egg quality tests, respectively. All data were analyzed following the GLM model using SAS software. The boiled and scrambled eggs from L, H, and C were (P ≤ 0.001) preferred followed by CH, HC, and KK. Results showed that KK, HC, CH, and C eggs were higher in moisture, crude fat, crude ash, and crude fiber, but these traits were found lower in H and L genotypes. A significantly highest crude protein was observed in L (21.19 ± 0.19) genotype, with higher in H (20.62 ± 0.26), intermediate in HC (19.96 ± 0.29), C (19.85 ± 0.10), and CH (19.40 ± 0.37), whereas the eggs from KK genotype had the lowest crude protein content (18.69 ± 0.20). The egg quality was (P = 0.001 -0.01) affected across traits except for eggshell indices (P > 0.05). The genotypes with a negative significant correlation with crude protein had a positive significant correlation with almost all composition and egg external quality traits. The genotypes with positive significant correlations of egg weight had positive significant correlations with most internal egg quality traits except that of yolk weight ratio, yolk albumen ratio, and yolk color. Conclusively: the eggs of L, H, and C genotypes were best favored followed by CH and C, but the KK genotype was the least favored, and these differences were deemed due to genetic variations, and

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“…Together, this is a very strong endorsement for the role of probiotics in promoting gut health, and animal health and productivity. Moreover, probiotic use will also have a positive impact on animal and bird welfare (Bryden et al 2021). Importantly, there is increasing evidence that the gut microbiota plays a central role not only in physical, but also mental wellbeing, with obvious implications for bird health and welfare (Kraimi et al 2019).…”

Section: Box 1 Necrotic Enteritismentioning

confidence: 99%

Probiotics and gut health: linking gut homeostasis and poultry productivity

Shini

Bryden

2021

Anim. Prod. Sci.

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The use of probiotics in poultry production has increased rapidly, and this movement has been promoted by global events, such as the prohibition or decline in the use of antibiotic growth promotants in poultry feeds. There has been a persistent search for alternative feed additives, and probiotics have shown that they can restore the composition of the gut microbiota, and produce health benefits to the host, including improvements in performance. Probiotics have shown potential to increase productivity in poultry, especially in flocks challenged by stressors. However, the outcomes of probiotic use have not always been consistent. There is an increasing demand for well defined products that can be applied strategically, and currently, probiotic research is focusing on delineating their mechanisms of action in the gut that contribute to an improved efficacy. In particular, mechanisms involved in the maintenance and protection of intestinal barrier integrity and the role of the gut microbiota are being extensively investigated. It has been shown that probiotics modulate intestinal immune pathways both directly and through interactions with the gut microbiota. These interactions are key to maintaining gut homeostasis and function, and improving feed efficiency. Research has demonstrated that probiotics execute their effects through multiple mechanisms. The present review describes recent advances in probiotic use in poultry. It focuses on the current understanding of gut homeostasis and gut health in chickens, and how it can be assessed and improved through supplementation of poultry diets with probiotics in poultry diets. In particular, cellular and molecular mechanisms involved in the maintenance and protection of gut barrier structure and function are described. It also highlights important factors that influence probiotic efficacy and bird performance.

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Nutrition, feeding and laying hen welfare

Cited by 37 publications

References 200 publications

Organic Egg Consumption: A Systematic Review of Aspects Related to Human Health

Organic Egg Consumption: A Systematic Review of Aspects Related to Human Health

Sensory Characteristics, Nutritional Composition, and Quality of Eggs from Different Chickens

Probiotics and gut health: linking gut homeostasis and poultry productivity

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