The present study aimed to determine the effect of supplementing diets of broiler with probiotic or enzymes on carcass traits and intestinal microflora. One hundred thirty five, one-day-old-Ross-308 chicks were randomly distributed into three experimental groups and every group was divided into three replicates of 15 chicks each. The first group received only basal diets (starter for 2 weeks and grower for 3 weeks) as control (C), the 2 nd group (T1) received the basal diets supplemented with probiotic (Guardizen-M) at the level of 1g/kg diet, while the 3 rd group (T2) received the basal diets supplemented with enzymes (Fra ® Multizyme) at the level of 0.5g/kg diet. The trial lasted for 35 days of age. The results indicated that percentages of carcass, breast, thigh, drumsticks were significantly (P≤ 0.05) higher for groups T1 and T2 compared with the control one. Using probiotics or enzymes resulted in a considerable (P≤0.05) lower amount of abdominal fat. The differences in percentages of drip loss, cooking loss, water holding capacity and giblets were not significant among all groups. Intestinal Lactobacillus bacteria was significantly (P≤0.05) increased and coliform bacteria was remarkably (P≤0.05) decreased in T1 and T2 groups compared with the control one. According to our findings, it might be concluded that supplementing broiler diets with 1g probiotic (Guardizen-M) or 0.5g enzymes (Fra ® Multizyme)/kg diets have positive effects on carcass traits and intestine morphology.

The aim of the experiment was to study the influence of lighting programmes on compensatory growth and carcass criteria of broiler chickens. A total number of 120 (one hundred twenty) Ross broiler chicks, one day old were equally divided into 3 treatments of 40 chicks each and further divided into 4 replicates (10 chicks/ replicate). The experimental lighting regime treatments were as follows: continuous, light stimulation and intermittent lighting. The results showed that the birds exposed to T1, and C achieved the highest BW and BWG compared to birds exposed to intermittent lighting. During the period from (0-6) wks of age, birds in groups (C) and (T1) achieved an increase in BWG and improved FCR than the group in (T2). In conclusion results suggested the application of a light stimulation better performance minimizing electricity costs.

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The study conducted at Faculty of poultry farm, Assiut University. Eighty weaned rabbits (40 of Newzealand and California rabbit breeds. 20 males and females of each) to evaluate the blood performance and energy value of meat of rabbits drenched different doses of propolis. Rabbits were allocated to one of the treatment groups (control group, 0.2, 0.4 or, 0.6 g drenched propolis /kg body weight) from 42 to 84 days of age. The results indicated that, the differences in body weight, daily gain and fed conversion ratio were not significant among all groups. RBCs and Hb were increased significantly of males treated with 0.2 g of propolis group than females and other groups. No significant differences were observed in Hb, WBCSs and total Protein due to sex. Total leucocytes counts were decreased by using propolis 0.2 treatment of females and males, also, 0.2 group treated California rabbits had the lowest values compared with 0.6 g of Newzealand rabbits. Total protein had the highest values in females and males blood samples treated with 0.4g propolis. The treatment with 0.2g increased total protein values in California but the 0.4g level increased it in Newzealand ones. Energy values (kJ.100 g -1 ) were higher in females (465.38±3.49 vs. 460.04±2.16 kJ.100 g -1 ), California exceeded New Zealand ones, were not significant. The 0.6g propolis level was the highest one (473.63±2.23) and significant. Correlation between W.H.C and cooking loss was negative and not significant. Both blood performance and energy value formulas are completely panoramic ways to evaluate Rabbits health.

The objectives of the experiment were to investigate the effects of different nutritional manipulations on the performance and carcass traits of broiler chickens. Seven treatments were used: control, super pre-starter diet (25% P) during the first three days of age, mix. of 2g of both yeast and glucose anhydrous, 2g synbiotic/Kg feed, 20g/500 ml water of synbiotic spraying, mix. of 2g synbiotic/Kg feed+20g/500 ml water of synbiotic spraying and mix. of super pre-starter diet (25% P) and 2g synbiotic/Kg feed. Two hundred eighty, one day old of broiler chicks were randomly selected in experiment lasted in 6 weeks of age. Body weight, feed consumption, body weight gain, feed conversion ratio and some carcass traits were studied. The results indicated that there was significant (P<0.05) increase in body weight due to super pre-starter supplementation at 4, 5 and 6 weeks of age. Body weight gain, feed consumption and feed conversion ratio were significantly (P<0.05) improved during the periods from (3-6) and (0-6) weeks of age. Dressed carcass percentage was increased significantly (P<0.05) in chicks fed mix. of synbiotic in feed and spray compared to the other treatments, the increased was 79.77% compared to control one (75.14%). Breast% was increased in chicks fed mix. of yeast and glucose anhydrous and also in chicks fed synbiotic in feed.Results concluded that using of super pre-starter diet during the first 3 days of age at level of (25% P) improved growth performance of broiler chicks.