Th is study was designed to investigate whether inclusions of coenzyme Q10, alpha lipoic acid and their combination into diets of hens improve egg quality characteristics. Forty-eight, 33 weeks old Lohmann Brown hens were assigned randomly to four groups of 12 hens each and fed either a basal diet or basal diet supplemented with 2 g/ kg coenzyme Q10, 0.4 g/kg alpha lipoic acid and 2 g/kg coenzy...

This study aimed to evaluate the potential of marine microalgae Nannochloropsis oceanica as a sustainable source n-3 polyunsaturated fatty acids (n-3 PUFA) for hen eggs enrichment. During 4 weeks, hens were fed with 3% (w/w) supplemented diet. Throughout assay, analyzed according several nutritional and physical parameters, namely: (i) protein, fat, ash content; (ii) acid profile; (iii) thickne...

ISA Brown hens were fed diets supplemented with the synthetic carotenoids Carophyll Red and Carophyll Yellow at 20 and 15 mg/kg, respectively, lutein at 250 mg/kg, and the algae Chlorella at 12.5 g/kg. The synthetic carotenoids, lutein, and Chlorella significantly increased egg weight (P < 0.001), shell weight (P < 0.001), and thickness (P = 0.017) and decreased the yolk/albumen ratio (P = 0.03...

Two experiments were performed to evaluate the effect of synthetic and natural carotenoids on the daily output of eggs and some parameters of their quality. The hens were fed a control diet and diets supplemented with synthetic carotenoids Carophyll Red and Carophyll Yellow, lutein, algae Chlorella, and mustard meal. Carotenoids had no effect on hen-day egg production. Both synthetic and natura...

This study was conducted to determine the effects of rosehip (RS, Rosa canina L.) supplementation on performance, carcass traits, meat quality, serum antioxidant activity, egg yolk pigmentation and fatty acid composition laying quail. A total 120 10-week-old quail were divided into 5 treatment groups with 8 replicates. The treatments as follows: first group fed control diet (C, no addition), ot...

This study was carried out to investigate the effect of different body weight groups (light (L) = 1 400–1 500; medium (M) = 1 500–1 600 and heavy (H) = 1 600 < g) on performance and egg quality traits of Lohmann hens, 24 weeks of age, in different laying periods. A total of 288 Lohmann White layers were allocated randomly to three groups with respect to live weight, each consisting of 24 replic...

This study aimed to determine the effect of Bifidobacterium sp. and Guazuma ulmifolia leaf extract on Japanese quail egg production, including mass, haugh unit (HU), yolk colour. A total 96 quails were in early stages which randomized into four treatments six replications. The (T0) without G. extract, (T1) 0.2% sp., (T2) (T3) + extract. Egg mass data was collected third fourth week treatment pe...

The objective of this experiment was to replace soya bean oil with glycerol in laying hen diets and assess the change's effect on performance, parameters of egg quality and the egg fatty acid profile. A total of 60 44-week-old Hy-Line W36 laying hens were distributed according to a completely randomised experimental design into four treatments consisting of glycerol substitutions for soya bean ...

This study was carried out to investigate the effect of two housing systems on external and internal egg characteristics of a commercial laying bird. Two hundred and eighty pullet of Nera layers were divided into two even group kept in different housing systems (deep litter vs cage). External and internal egg quality traits were examined at 26, 30, 34 and 38wk. Data were then collected on egg w...