Background The breeder rooster has played a pivotal role in poultry production by providing
high-quality semen. Typically, fertility peaks between 30 and 40 weeks of age and then …

Animal welfare concerns in laying-hen production facilities have necessitated research on
alternative strategies for improving egg production and hen health. At present, most laying …

Molting in birds provides us with an ideal genetic model for understanding aging and
rejuvenation since birds present younger characteristics for reproduction and appearance …

This study aimed to investigate plumage conditions, injuries in the comb, cloaca, and feet at
the end of the laying period (73 weeks of age) in native Atak‐S (A‐S) and foreign Isa Brown …

The estrogen estradiol-17ß is known as one of the major gonadal steroid hormones with
different functions in reproduction. In this study we analyzed estradiol-17ß concentration in …

The superiority of synbiotics in terms of their biological effects depends primarily on a
suitable combination of both components, pro‐biotic and pre‐biotic. The present study was …

Two feeding trials were conducted to stall the egg production (EP) in laying hens during a
lean phase of the market demand for eggs through dietary modulations. For this, 1,000 and …

To improve hen welfare, several studies have investigated various environmental
enrichments that suit different laying hen production systems. The positive results of these …

The quality of egg shell and bone properties of hen are important for hen welfare,
consumers, and producers. Parameters of the genetic selection have both desirable and …

This study aimed to investigate the effects of diets supplemented with 25-
hydroxycholecalciferol [25-(OH) D3] and additional vitamin E on growth performance …