An experiment was designed on 165 local Sinai laying hens (150 females + 15 males), 47 wk-old, were equally divided into five dietary treatments to determine possible benefits from dietary supplementation with proanthocyanidins to the layer's diet of grape pomace and green tea extracts (GPGT extract) at levels (0, 50, 100, 150 and 200 mg/kg diet) on productive and reproductive performance during the laying period from 47 to 62 wk of age. Results illustrated that egg number/hen or laying rate (%) significantly (P≤0.05) improved due to feeding the diet supplemented with 150 mg GPGT extract/ kg diet as compared to the control group. Also, the hens fed diet supplemented with 150 mg GPGT extract recorded the highest value of egg mass when comparing with the control and other dietary treatments. Fertility % of eggs from hens fed diet supplemented with 100 and 200 mg GPGT extract / kg diet was significantly (P≤0.05) increased compared to the low level of extraction (50 mg/ kg diet) and control diet. The diet supplemented with 100 mg GPGT extract / kg diet had higher hatchability % and chick weight than the control diet. In addition, total antioxidant capacity yolk content in was significantly increased as a result of feeding on diet with 150 mg GPGT extract/ kg diet compared to the control diet. It could be concluded that supplementation 150 mg GPGT extract / kg diet in Sinai hen's diets can be used to maximize the egg production performance, quality of egg yolk and economic efficiency from 47 to 62 wk of age. Moreover, these results suggest that 100 mg GPGT extract/ kg layer diet can be applied for optimal performance of reproductive traits.

The objective of the present study was to evaluate the effect of dietary Anta ® Ox FlavoSyn (as a wide source of natural Proanthocyanidins) on growth performance, carcass characteristics, blood constituents, and economic efficiency of local Domyati ducklings for 7 weeks. A total of 240 ducklings (8 weeks of age) was distributed into 4 groups with 6 equal replicates (10 ducklings/each replicate). The first group was fed the control basal diet (BD, 0.0 mg Anta ® Ox FlavoSyn/kg diet) while, others fed 100, 150 and 200 mg Anta ® Ox FlavoSyn/kg diet. The obtained results illustrated that ducklings fed 100 and 150 mg Anta ® Ox FlavoSyn/kg diet displayed significantly (P ≤ 0.05) higher body weight gain, and performance index, lower feed consumption, and better feed conversion ratio than those fed the high level 200 mg/kg diet or those fed free-Anta ® Ox FlavoSyn BD (control group) at different experimental periods. Ducklings fed different levels of Anta ® Ox FlavoSyn had significantly improved carcass traits, hematological, and serum biochemical parameters, total antioxidant capacity, and economic efficiency compared to the control group. Consequently, it could be concluded that the usefulness of Anta ® Ox FlavoSyn as a promising feed additive for enhancing the productive performance, health status, physiological responses of Domyati ducklings. Owing to its low price and the high natural antioxidant properties of the tested material can be used economically in diets of growing local Domyati ducklings, especially at levels of 100 and 150 mg/kg diet.