This study was conducted to evaluate the impact of stocking density on behavioral patterns, growth performance, blood hormones, and carcass quality of Sasso broilers within 60 days of rearing cycle. A total number of 150 one day old unsexed Sasso (first generation) chicks were allocated randomly according to their stocking density to 3 groups 10,13 and 15 birds per m 2 in different floor spaces5, 3.8, and 3.3 m 2 respectively. Growth performance and behavioral patterns were estimated throughout the study period. Blood samples for cortisol and thyroid hormones estimation were collected every two weeks. At the end of the study 3 birds from each group were slaughtered to check the effect of stocking density on carcass parameters. The results of the current study revealed that stocking density affect significantly (P = 0.05) on final body weight, feed consumption, and organs weight, but had no significant effect on feed conversion rate (FCR). There was no significant effect of stocking density on blood cortisol or thyroid hormones concentrations. It was concluded that rearing Sasso broiler at stocking density 10 birds /m 2 has the best effect as it did not affect negatively either on growth performance, blood parameters, or behaviors.

The current study was conducted to investigate the impact of feed restriction on behavioral patterns, productive, and reproductive performance of Japanese Quail. Total number of 480 quail aged 6 weeks of both sexes were equally assigned to four groups (3 replicates per group). First Group (G1) was allowed to eat the whole day (control group). Second (G2), Third (G3), and Fourth Group (G4) were allowed to eat two times, three times, and four times per day respectively. All groups were subjected to 16 hours of light per day. Behavior of birds was observed 3 days per week. Body weight, productive performance (egg weight and quality), and reproductive performance (fertility and hatchability) were measured for all groups. Results were analyzed using mixed models in SPSS. Analysis showed that feeding twice a day significantly reduces the body weight (P<0.057), frequency of sexual behavior (P<0.05), percentage of fertility (P<0.0001), hatchability (P<0.001), percentage of unhatched fertile eggs (P<0.0001), and clear eggs (P<0.0001), compared to the control group. While feeding three and four times a day had a significantly higher effect on egg production (P<0.0001), egg weight (P<0.0001), fertility (P<0.0001), and hatchability (P<0.001) than feeding twice a day. Results showed that feed restriction could be used to protect the health and welfare of Japanese quail.

The current study was carried out to estimate the effect of environmental enrichments (E.E.) on behavioral patterns, growth performance, and hematological and hormonal changes in Japanese quail. A total number of 216 healthy Japanese quails 1-month-old with an average body weight of 135.66 ±1.32 g was randomly assigned to three groups (72 birds each), and each group was divided into three replicates (24 birds each) with a sex ratio of 1 male to 3 females according to the environmental enrichment within the pen. The first group had no environmental enrichment (control group), the second group was subjected to visual enrichment by using mirrors 40 cm in length fixed into the pen in the wall behind the birds (mirror group), while the birds in the third group were subjected to auditory enrichment through using of classical music which comes from speaker hanged at one corner of the pen. Behavioral patterns and growth performance were recorded weekly. At the end of the study, 15 birds from each group were selected randomly and slaughtered to obtain blood samples; 6 ml of blood was collected from each bird for hematological analysis and cortisol determination. The obtained results revealed that environmental enrichments especially using music, improved the feeding and comfort behaviors of Japanese quail and reduced aggression followed by mirror group and control one. No significant effect of E.E. on growth performance (P<0.05). In conclusion, environmental enrichments of Japanese quail houses improved the behavioral patterns.