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Poultry egg quality
Egg quality defines those characteristics of an egg that affect consumer acceptability and preference. Components of quality include shell quality and interior egg quality for shell eggs, and interior egg quality for further processed eggs. The quality of the egg once it is laid cannot be improved. Hence, its maintenance is mostly a preventive process. Egg quality is influenced by several factors including rearing, temperature, humidity, handling, storage, and egg age. Shell quality: There are five major classes of shell defects: integrity, texture, shape, color, and cleanliness. Internal egg quality involves functional, aesthetic and microbiological properties of the egg yolk and albumen. The proportions of components for fresh egg are 32% yolk, 58% albumen and 10% shell. Regarding exterior egg quality, the shell of each egg should be smooth, clean and free of cracks. The eggs should be uniform in colour, size and shape.
Effects of heat stress on plasma calcium concentration, egg production and egg quality Highly productive modern poultry breeds are more prone to heat stress and rising global temperatures is one of the greatest challenge for the industry. It greatly damages a bird’s performance in terms of feed intake, feed conversion, body weight, egg production, rooster activity and hatchability (Nilipour, 1996). Stress of high environmental heat during summer also interfere with the...
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To get balanced nutrition it is not necessary to eat expensive food. Apart from being inexpensive, egg is a wholesome food which contains balanced amount of essential nutrients like protein, vitamins and minerals. All these nutrients are in highly protected form. Nature has provide the protection to egg, from deterioration, by egg shell then by shell membranes and finally by the antibodies present in the egg. Nutritional...
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Dr. John Thomson from AlzChem explains some of the benefits of using creatine in breeders hens...
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This past week, there has been an uptick in social media videos and news stories perpetuating false claims about commercial chicken feed and its impact on the availability and price of eggs. To better understand how diet relates to a hen’s egg output, I spoke with our resident animal nutritionist, Paul Davis, Ph.D. Davis has a doctorate in animal nutrition and the added benefit of being able to tap into fellow nutrition experts’ knowledge on the American Feed Industry Association...
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Shawna Weimer (University of Arkansas and Poultry Extension Collaborative) talks about the transition to cage-free production and consumer preferences, as well as enrichments and stunning, in this interview during IPPE 2023 in Atlanta, USA....
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The egg is the most sensitive food for human, which require the minimumtransformation process form the farm to the table; and the one that is the most biologically active and without having undergone sterilisation processes. To preserve the optimal properties of the egg, it is crucial to ensure a good quality of the eggshell. The parameters of eggshell quality: resistance, increased porosity, fragility and the presence of malformations or fissures...
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“Spotted” or “mottled” eggshells are those that show many translucent spots during candling. Under normal light, the eggs may appear marble-like. The translucent spots are areas where the eggshell structure is disorganized and has become thinner and weaker. The normal eggshell has many pores to allow the gas exchange...
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It has been proposed that the metabolic energy requirements of free-ranging hens are up to 15% higher compared to caged hens due to the increased metabolic activity required for locomotion and thermoregulation (GfE 1999; Tiller 2001; Aerni et al. 2005). The aim of the study was to investigate the impact of various feed strategies on laying performance and egg quality of free-range laying hens. A total of 9,375 hens, placed amongst 5 flocks of 40,000 hens each were selected according to their...
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Laying hens are female chickens raised for egg production. The egg production system in the US is currently undergoing a transition from conventional cages to cage-free housing systems. The number of cage-free housing has increased from 4% hens in 2004 to 28% at the end of 2020 (USDA-NASS, 2021). Cage-free systems provide space...
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by Sam Shafer
Switching from blue to red light in laying operations may benefit birds, but there are caveats
According to new research in The Journal of Applied Poultry Research , hens can benefit from both blue and red light—if these lights are provided at specific points in production. The study, led by scientists at Mississippi,...
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Background & Objectives Calcium and phosphorus are considered to be the major macro-minerals in layer diets, due to their expressive contribution to the metabolism in birds and the quality of the eggs. Those two minerals are closely related in a such that a deficiency in one can interfere with the proper utilization of the other. However, few studies have been conducted to evaluate the requirement of Ca and P along with the correct synergy between them in layer diets....
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1 INTRODUCTION During the last decades, the productivity of laying hens has improved significantly, with higher number of eggs produced over the laying cycle and higher efficiency to utilize feed nutrients. This increase in productivity implies in a change in the requirements, and consequently, these hens become more demanding in nutrients, mainly amino acids (Elliot, 2008). Optimization of protein supply by understanding the amino acid needs of these hens requires a thorough...
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The 2023 Latin American Poultry Summit will kick off with a session on market management, presented by two renowned poultry industry experts and followed by a panel discussion. Sponsored by the International Poultry Expo (IPE), part of the International Production & Processing Expo (IPPE), and the Latin American Poultry Association (ALA), the Latin American Poultry Summit is organized into four tracks to provide in-depth information in each area.
Paulo de León, director of...
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INTRODUCTION The production performance of laying hens during their late laying period is rapidly decreasing. This late period represents nearly 50% of the whole laying period, and laying hens are generally eliminated at about 500 days of age. However, laying hens still maintain a laying rate of 60-70% at this time; therefore, the production performance of flocks during this late laying period directly affects the economic benefits of farmers. Therefore, prolonging the...
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Mike Persia (Virginia Tech University) discusses the effects of high concentrations of this vitamin on skeleton health and eggshell quality, during IPPE 2018 in Atlanta, USA....
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I. INTRODUCTION Optimum BW is an important consideration in achieving early maturity, high productivity and uniformity in laying hens (Lacin et al., 2009). Parkinson et al. (2015) noted that it was common for Australian flocks to have an average body weight (BW) 100-300 grams above the breed standard weight (BSW). This higher BW is indicative of bird obesity and is associated with the production of excessively large eggs with consequently lower eggshell quality and...
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Introduction Conventional systems (battery cages) lead commercial egg production worldwide due to their reportedly efficient disease prevention processes (WHILEY; ROSS, 2015). However, shifts in egg consumption have drawn attention to potential animal welfare issues and generated demand for alternative laying systems with improved hen wellbeing. In this way, free-range systems could be an ideal choice for egg production and hen welfare (JONES at al., 2012); however, despite...
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I. INTRODUCTION True sustainability was defined by the World Commission on Environment and Development (Brundtland Commission, 1987) as “the ability to meet the needs of the present without compromising the ability of future generations to meet their own needs”. Sustainability is a concept with multiple facets including, environmental (which includes both the demand for resources and environmental pollution), ethical (welfare and social conscience), economic and...
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I. INTRODUCTION The current system of feeding laying hens with a fully mixed diet, that attempts to meet all the nutrient requirements of the birds, only really developed with the introduction of cage housing facilities after the Second World War. Research on confining laying hens to cages ramped up in the first half of the 20th Century in California but it was not until the late 1940s that the first commercial cage farms started to appear (American Egg Board, 2020). Nutrition...
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