BV-300 (White) Layer stock performance specifications Livability at growing period - 97 – 98% Livability at laying period- 94 – 96% Peak egg production - 97% + No of weeks above 90% egg production - 40 + Per hen housed (up to 72 weeks of age) - 330 + Average egg weight up to 72 weeks of age - 58g Feed efficiency - 124g Body size at 20 weeks - 1.3 – 1.36 kg Body size at 72 weeks - 1.6 kg Parent stock performance specifications Female livability from 0 to 20 weeks - 95% Female livability from 21 to 72 weeks - 92% Male livability from 0 to 20 weeks - 90% Male livability from 21 to 72 weeks - 92% Age at start of Hatching Egg - 25 weeks Number of hen housed eggs at 21 to 72 weeks - 287 Number of settable hen housed eggs at 25 to 72 Weeks - 260 Average % of hatching eggs - 90.5 Average % of hatching eggs (On set eggs) - 90.5   BV 380 (Brown) Parent stock performance specifications Female livability from 0 to 20 weeks - 97% Female livability from 21 to 72 weeks - 92% Male livability from 0 to 20 weeks - 95%> Male livability from 21 to 72 weeks - 96% Age at start of Hatching Egg - 25 weeks Number of hen housed eggs at 19 to 72 weeks - 289+ Number of settable hen housed eggs at 25 to 72 weeks - 240+ Average % of hatching eggs - 83.3 Average % of hatching eggs (On set eggs) - 84.0 Female Body weight at 21 week - 1.5 kg Female Body weight at 72 week - 1.85 kg Feed Consumption /Female Housed at 0 to 20 weeks - 7.5 kg Feed Consumption /Female Housed at 21 to 72 weeks - 43 kg   Hyline W-36 Growing period (upto 17 weeks) Livability — 97% Feed consumed — 5.21 kg Body weight at 17 weeks - 1.24 kg Laying period (upto 110 weeks) Livability to 60 weeks - 96% Livability to 80 weeks - 94% Percent peak - 93-94% Days to 50% production (from hatch) - 146 Total egg mass per hen-day (18-80 weeks) - 20.8 kg Total egg mass per hen- housed (18-80 weeks) - 20.2 kg Body weight at 32 weeks - 1.52 kg Body weight at 70 weeks - 1.54 kg Feed conversion rate (21-60 weeks) - 1.82 Feed conversion rate (21- 80 weeks) - 1.86 Feed per dozen eggs (21-60 weeks) - 1.29 kg Feed per dozen eggs( 21-80 weeks) - 1.35 kg Egg weight at 38 weeks - 60.1 g Egg weight at 84 weeks - 63.5 g   Hyline Brown Growing period (upto 17 weeks) Livability — 97% Feed consumed — 5.62 kg Body weight at 17 weeks - 1.40 kg Laying period (upto 110 weeks) Livability to 60 weeks - 97% Livability to 80 weeks - 94% Percent peak - 94-96% Days to 50% production (from hatch) - 140 Total egg mass per hen- housed (18-80 weeks) - 22 kg Body weight at 32 weeks - 1.52 kg Body weight at 70 weeks - 1.54 kg Feed conversion rate (21-60 weeks) - 1.99 Feed conversion rate (21- 80 weeks) - 2.04 Feed per dozen eggs (21-60 weeks) - 1.47 kg Feed per dozen eggs( 21-80 weeks) - 1.53 kg Egg weight at 32 weeks - 61.6 g Egg weight at 70 weeks - 64.1 g   Bovans White Growing period (0- 17 weeks) Livability  - 97% Body Weight (17 Weeks of Age) - 1175 g Body Weight (18 Weeks of Age) - 1250 g Feed Consumption (17 Weeks of Age)- 5.12 kg Feed Consumption (18 Weeks of Age)- 5.60 kg Laying period (18- 72 weeks) Livability - 94% Age at 50% Production (Days) - 144 Percent Peak  - 95% Average Egg Weight -  60.5 g Hen Housed Eggs -  330 Hen Housed Egg Mass -  20.0 kg Average Feed Consumption per Day  - 106 g Kg Feed / Kg Eggs  -  2.10 Body Weight (76 Weeks of Age) - 1700 g   Lohmann Its livability during growing is 97-98% and during laying period is 94-96%. Its feed conversion ratio (FCR) is 2.1 – 2.2. Its body weight at 20 weeks is1.6 – 1.7 kg and at end of production is 1.9 – 2.1 kg. Its hen housed egg production in 12 months is 295-305 eggs and in 14 months is 335 - 345 eggs. Its peak production is 92-94%. Its age at 50% production is 140-150 days. Its egg shell color is attractive brown. Source: Expert System on Poultry, ICAR-TANUVAS-TNAU