Milk urea nitrogen (MUN) of dairy cows was determined in relation to breed. A total of forty (40) Pabna and red Chittagong dairy cattle each of twenty (20) were selected to know the milk composition, nutritional status and milk urea nitrogen. Live weight of Pabna Cattle (187±14 kg) was higher than that of red Chittagong cattle (174±4 kg). In Pabna cattle milk yield (4.94 kg), minerals (0.15%) and lactose (5.38%) is more than red Chittagong cattle milk yield (3.62 kg), minerals (0.12%) and lactose (5.37%) but fat (5.04%), protein (3.7%) and solid not fat (SNF) content (9.92%) was more in red Chittagong cattle than Pabna cattle fat (4.03%), protein (3.64%) and SNF (9.87%). The metabolic energy 74.93 MJ/day, dry matter 9.47 kg, crude protein 0.84 kg , ash 1.24 kg, crude fiber 2.18 kg and true digestible nutrient 5.43 kg was required for Pabna cattle and in red Chittagong cattle metabolic energy 72.60 MJ/day, dry matter 9.14 kg, crude protein 0.660kg , ash 1.16 kg, crude fiber 1.93 kg and true digestible nutrient 5.19 kg was required. Milk urea nitrogen (MUN) concentration was higher under in Pabna cattle (38.15 mg/dL) than red Chittagong cattle (RCC) (29.30 mg/dL). Milk urea nitrogen (MUN) differ Pabna cows and red Chittagong cows. Manuscript profile

Theexperiment was conducted to investigate the growth performance and feed conversion efficiency of crossbred heifer at different age level in Government Dairy Farm in Bogra, Bangladesh. Twelve female crossbred heifers were equally distributed (n=3) into four groups [Group A: (7±2 months), B: (12±2 months), C: (15±2 months) and D: (20±2 months)] according to age and fed concentrate mix, rice straw and Napier grass at the rate of 2% of live weight. Napier grass and rice straw were offered at the ratio of 1:1. The concentrate mixture was provided at the rate of 1% of their body weight. It was found that dry matter content was higher in concentrate mix and rice straw and lower in Napier grass. Organic matter content was higher in Napier grass than that of concentrate and rice straw. Crude fiber concentration was higher in rice straw than that of concentrate and Napier grass. Intake of dry matter and organic matter differed significantly among the treatment groups. Crude protein intake was higher in C group heifer than other groups. Intake of crude fiber was higher in C group followed by B, D and A group. The final live weight was higher in D group than C, B and A group. Unit feed dry matter intake was higher with the advancement of age, being lowest in younger group. The heifers of D group showed higher value of feed conversion efficiency followed by C, B and A group respectively and concluded 20 ± 2 months of heifer is more economical than the other ages. Manuscript profile

A total number of 66 day old Japanese quail chicks divided into 2 treatment groups (33 in each treatment) with 3 replications in each having 11 birds (male, 5 and female, 6) were reared on floor and in cage system for a period of 5 weeks to know the effect of rearing system on growth performance and carcass characteristics. At the age of 35 days, average body weight and feed intake were 102.15 and 320.7 g/quail for cage and 78.41 and 146.02 g/quail for floor system, respectively. Feed conversion ratio (FCR) was 3.89 and 4.10 for cage and floor system, respectively (P<0.01), at the end of study period. Body weight, feed intake and FCR were significantly (P<0.01) different between cage and floor rearing system. At the age of 21 and 35 days survivability were 72.72 and 72.72% for cage and 63.63 and 60.60% for floor, respectively. There was higher survivability in cage system. In case of meat yield characteristics, average weight of breast, thigh, wing, drum stick were 20.92, 7.37, 5.42 and 5.72 g for cage and 20.84, 7.35, 5.39 and 5.63 g for floor, respectively. There were no significant difference among average weight of breast, thigh and drum stick between two rearing system. In case of sex average, wing weight differed among sexes. It was concluded that cage reared quails showed better performance compared to littered floor rearing system. Manuscript profile