Effect of administration of olive oil in yolk- sac on growth performance and breast development in broiler chickens exposed to post- hatch fasting stress

This experiment was carried out to investigate the effects of in yolk-sac administration of olive oil (0 and 0. 7 ml) on productive performance and breast development of broiler chickens exposed to post-hatch fasting stress (0، 12، 24، 36 and 48 hours). A total number of 800، 1-day-old broiler chicks in a completely randomized block design with 10 treatments and 4 replicates were used. Live body weight of broiler chicks exposed to 24 and 36 hours post-hatch fasting was significantly lower compared to control group (P<0. 05). Extending of post hatch fasting up to 48 hours induced compensatory growth in broiler. Administration of olive oil to yolk sac significantly increased mortality rate and negatively affected production efficiency index (P<0. 05). In day 28، fasting and administration of olive oil showed no significant effect on breast external dimensions and on major and minor pectoral is muscles weight (P<0. 05). It is concluded that 24 and 36 hours Post-hatch fasting had negative effect on broiler performance and that injection of 0. 7 ml olive oil was reduced performance of broiler chickens exposed to post-hatch fasting.