The experiment was designed to evaluate the effect of egg size on hatching quality and post-hatch growth performance normal feathered indigenous chickens. Hatchable eggs, grouped into three sizes: medium/control, small large, were incubated obtain day-old chicks. One hundred eighty (180) chicks allotted treatment groups according sizes from which they hatched. Egg significantly (p<0.05) infl...

BACKGROUND To control avian coccidiosis with drug-independent strategy effectively and safely, multivalent hyperimmune egg yolk immunoglobulin (IgY) was prepared and its ability to protect against Eimeria tenella infection was evaluated. METHODS Hens were orally immunized with live oocysts of 5 species of Eimeria for six times, antibody titers in serum and yolk were monitored by indirect enzy...

Studies of kin recognition in birds have usually examined parent-offspring recognition, while studies of sibling recognition are relatively rare. Using choice experiments, we studied the development of sibling recognition among common tern, Sterna hirundo, chicks and tested the cues used for recognition. We collected newly hatched common tern chicks and raised them in a laboratory in 10 artific...

Ghrelin is a regulatory peptide with specific anti-oxidative effects. The aim of this study was to investigate the activity of two antioxidant enzymes includes superoxide dismutase (SOD) and glutathione peroxidase (GPx) in erythrocyte of newly-hatched chicken following in ovo administration of ghrelin. The fertilized eggs were divided into four experimental groups; control G1 (without injection...

OBJECTIVE To assess the effects of prenatal administration of valproic acid on the survivability and day of hatching of chick embryo in comparison with age-matched controls. METHODS The experimental study was conducted at the Department of Anatomy, Regional Centre of College of Physicians and Surgeons Pakistan, Islamabad, from February 2010 to February 2011. Fertilised chicken eggs were divid...

The present study was designed to investigate the prevalence of Salmonella species, their molecular characterization and antibiotic resistance in backyard chickens. A total of 1125 samples were collected from backyard chickens in two consequent samplings. In the first part, samples were included of 820 poor recently hatched chicks, hatching residuals, egg shells in the nest floor, cloacal swabs...