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ISA BROWN COMMERCIAL LAYER Production chart PER HEN DAY % lay age egg weight (g) in weeks 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 std. 2 16 38 64 84 91 93 94 95 96 96 95 95 95 95 94 94 94 94 93 93 93 92 92 92 92 92 91 91 91 90 90 90 89 89 89 88 88 88 87 87 87 86 86 85 85 84 84 83 83 82 81 81 80 79 79 78 77 77 76 76 75 75 74 74 74 73 73 72 72 71 71 70 act. std. 43.0 45.5 49.0 52.0 54.5 56.4 57.7 58.8 59.6 60.2 60.7 61.1 61.5 61.9 62.2 62.4 62.7 62.9 63.0 63.1 63.2 63.3 63.3 63.4 63.4 63.5 63.5 63.6 63.6 63.7 63.7 63.8 63.8 63.8 63.9 63.9 63.9 64.0 64.0 64.0 64.1 64.1 64.1 64.2 64.2 64.2 64.3 64.3 64.3 64.3 64.4 64.4 64.4 64.4 64.5 64.5 64.5 64.5 64.5 64.6 64.6 64.6 64.6 64.6 64.7 64.7 64.7 64.7 64.7 64.8 64.8 64.8 64.8 act. PER HEN HOUSED egg feedintake feedconversion mass/day (g) p.d. (g) p. week std. 0.9 7.3 18.6 33.3 45.8 51.3 53.7 55.3 56.6 57.8 58.3 58.0 58.4 58.8 59.1 58.7 58.9 59.1 59.2 58.7 58.8 58.9 58.2 58.3 58.3 58.4 58.4 57.9 57.9 58.0 57.4 57.3 57.4 56.8 56.9 56.9 56.2 56.3 56.3 55.7 55.8 55.8 55.1 55.2 54.6 54.5 54.0 54.0 53.4 53.3 52.8 52.2 52.2 51.5 51.0 51.0 50.3 49.6 49.7 49.1 49.1 48.4 48.5 47.8 47.8 47.9 47.2 47.2 46.6 46.6 46.0 46.0 45.4 act. std. 84 90 96 106 110 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 act. std. 95.35 11.83 5.16 3.19 2.40 2.18 2.09 2.03 1.98 1.94 1.92 1.93 1.92 1.91 1.90 1.91 1.90 1.90 1.89 1.91 1.91 1.90 1.92 1.92 1.92 1.92 1.92 1.94 1.94 1.93 1.95 1.96 1.95 1.97 1.97 1.97 1.99 1.99 1.99 2.01 2.01 2.01 2.03 2.05 2.07 2.07 2.09 2.09 2.12 2.12 2.14 2.17 2.17 2.20 2.22 2.22 2.25 2.28 2.28 2.30 2.31 2.34 2.33 2.37 2.36 2.36 2.40 2.39 2.43 2.43 2.46 2.46 2.49 act. eggs cum. egg mass (kg) cum. std. 0 1 4 8 14 21 27 34 40 47 53 60 67 73 80 86 93 99 106 112 119 125 131 138 144 150 157 163 169 175 181 188 194 200 206 212 218 224 230 236 242 247 253 259 265 271 276 282 287 293 299 304 309 315 320 325 331 336 341 346 351 356 361 366 371 376 381 385 390 395 400 404 409 act. std. 0.0 0.1 0.2 0.4 0.7 1.1 1.5 1.9 2.2 2.6 3.1 3.5 3.9 4.3 4.7 5.1 5.5 5.9 6.3 6.7 7.1 7.5 7.9 8.3 8.7 9.1 9.5 9.9 10.3 10.7 11.1 11.5 11.9 12.3 12.7 13.0 13.4 13.8 14.2 14.6 14.9 15.3 15.7 16.1 16.4 16.8 17.2 17.5 17.9 18.3 18.6 19.0 19.3 19.7 20.0 20.3 20.7 21.0 21.3 21.7 22.0 22.3 22.6 23.0 23.3 23.6 23.9 24.2 24.5 24.8 25.1 25.4 25.7 act. feed (kg) cum. std. 0.6 1.2 1.8 2.6 3.4 4.1 4.9 5.7 6.5 7.2 8.0 8.8 9.6 10.4 11.1 11.9 12.7 13.5 14.2 15.0 15.8 16.5 17.3 18.1 18.9 19.6 20.4 21.2 21.9 22.7 23.5 24.2 25.0 25.8 26.5 27.3 28.0 28.8 29.6 30.3 31.1 31.8 32.6 33.4 34.1 34.9 35.7 36.4 37.2 37.9 38.7 39.5 40.2 41.0 41.7 42.5 43.2 44.0 44.8 45.5 46.3 47.0 47.8 48.5 49.3 50.0 50.8 51.5 52.3 53.0 53.8 54.5 55.2 feedconversion % mortality cum. act. std. 95.35 20.66 9.88 6.17 4.54 3.77 3.35 3.07 2.88 2.74 2.63 2.55 2.48 2.43 2.38 2.34 2.31 2.28 2.26 2.24 2.22 2.20 2.19 2.17 2.16 2.15 2.14 2.13 2.13 2.12 2.11 2.11 2.10 2.10 2.09 2.09 2.09 2.09 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.08 2.09 2.09 2.09 2.09 2.10 2.10 2.10 2.11 2.11 2.11 2.12 2.12 2.12 2.13 2.13 2.13 2.14 2.14 2.15 act. std. 0.1 0.2 0.3 0.4 0.5 0.5 0.6 0.7 0.7 0.8 0.9 1.0 1.0 1.1 1.2 1.2 1.3 1.4 1.5 1.5 1.6 1.7 1.8 1.9 1.9 2.0 2.1 2.2 2.3 2.3 2.4 2.5 2.6 2.7 2.7 2.8 2.9 3.0 3.1 3.1 3.2 3.3 3.4 3.5 3.5 3.6 3.7 3.8 3.9 3.9 4.0 4.1 4.2 4.3 4.3 4.4 4.5 4.6 4.7 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.1 The information supplied in this guide is based on many actual flock results obtained under good environmental and management conditions. It is presented as a service to our customers and should be used as a guide only. It does not constitute a guarantee or warranty of performance in any way. Farm Housing type House no. Hatch date Feed No. layers housed bodyweight cum. Housing date Age of housing act. std. 1500 1580 1640 1705 1755 1790 1805 1820 1830 1840 1850 1860 1870 1880 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1935 1940 1945 1945 1950 1950 1950 1955 1955 1960 1960 1960 1965 1965 1965 1965 1970 1970 1970 1975 1975 1975 1975 1980 1980 1980 1985 1985 1985 1985 1985 1990 1990 1995 1995 1995 2000 2000 2000 2005 2005 2005 2010 2010 2015 2015 2015 2015 act.