anchor.diff:  "1515","Leonard Lee","blue bar","cock","31/88",1518.8,"OLD BIRD"
   "1516","Jones Bros Lo","blue bar","hen","30-Aug",1518.1,"OLD BIRD"
   "1517","Leonard Lee","blue bar","hen","32/88",1518,"OLD BIRD"
  -"1518","Hap Hilton/55","blue bar","cock","102.067",1516,"OLD BIRD"
  -"1519","FRALEY/SKUR/8","complex","cock","124.287",1511.5,"OLD BIRD"
  +"1518","Hap Hilton5","blue bar","cock","102.067",1516,"OLD BIRD"
  +"1519","FRALEY/SKUR","complex","cock","124.287",1511.5,"OLD BIRD"
   "1520","FRALEY/SKURSK","complex","cock","8-Feb",1511.5,"OLD BIRD"
   "1521","FRALEY/SKURSK","blue bar","cock","8-Mar",1511.4,"OLD BIRD"
  -"1522","Malone Loft/4","complex","hen","177.682",1510.5,"OLD BIRD"
  -"1523","B Crossen /53","blue check","hen","101.597",1506,"OLD BIRD"
  -"1524","B Crossen /72","blue check","cock","102.025",1504,"OLD BIRD"
  -"1525","Lowells Gun/9","dark check","cock","98.794",1504,"OLD BIRD"
  +"1522","Malone Loft","complex","hen","177.682",1510.5,"OLD BIRD"
  +"1523","B Crossen3","blue check","hen","101.597",1506,"OLD BIRD"
  +"1524","B Crossen2","blue check","cock","102.025",1504,"OLD BIRD"
  +"1525","Lowells Gun","dark check","cock","98.794",1504,"OLD BIRD"
   "1526","B Crossen","blue bar","hen","Feb-72",1503.7,"OLD BIRD"
   "1527","B Crossen","blue bar","cock","Mar-72",1503.6,"OLD BIRD"
   "1528","B Crossen","blue bar","hen","Apr-72",1503.6,"OLD BIRD"
  -"1529","Sundown Lof/2","complex","hen","161.928",1503.4,"OLD BIRD"
  +"1529","Sundown Lof","complex","hen","161.928",1503.4,"OLD BIRD"
   "1530","Leonard Lee","blue bar","cock","Feb-80",1501.6,"OLD BIRD"
   "1531","Leonard Lee","blue bar","cock","Mar-80",1501.2,"OLD BIRD"
  -"1532","D J Loft  /22","blue bar","cock","100.251",1500.9,"OLD BIRD"
  +"1532","D J Loft2","blue bar","cock","100.251",1500.9,"OLD BIRD"
   "1533","KEN FRALEY","complex","hen","8-Mar",1500.6,"OLD BIRD"
   "1534","Leonard Lee","blue check","cock","Apr-80",1500.6,"OLD BIRD"
  -"1535","Jerry King /5","blue bar","cock","154.013",1499.5,"OLD BIRD"
  +"1535","Jerry King","blue bar","cock","154.013",1499.5,"OLD BIRD"
   "1536","Jack Chavis","complex","hen","14-Feb",1499.1,"OLD BIRD"
  -"1537","Matt Hazen /2","blue check","hen","176.101",1498.1,"OLD BIRD"
  -"1538","Rob Wilson/20","blue check","cock","93.296",1497.8,"OLD BIRD"
  +"1537","Matt Hazen","blue check","hen","176.101",1498.1,"OLD BIRD"
  +"1538","Rob Wilson0","blue check","cock","93.296",1497.8,"OLD BIRD"
   "1539","Riggins,Orval","blue bar","cock","17-Apr",1497.6,"OLD BIRD"
  -"1540","Al Fenrich /4","blue bar","cock","166.732",1496.4,"OLD BIRD"
  +"1540","Al Fenrich","blue bar","cock","166.732",1496.4,"OLD BIRD"
   "1541","STEVE LESLEY","complex","hen","14-Apr",1496.4,"OLD BIRD"
   "1542","STEVE LESLEY","complex","cock","14-May",1496,"OLD BIRD"
   "1543","KEN FRALEY","blue bar","cock","8-Apr",1494.8,"OLD BIRD"
  
positive.code: "1025","Dr Lee Nelson","blue bar","hen","5/25",776,"YOUNG BIRD"
  "1026","Terry Dry","blue bar","cock","7/30",768.2,"YOUNG BIRD"
  "1027","STEVE LESLEY","unknown","cock","8/23",767,"YOUNG BIRD"
  "1028","Karen Flemm/6","red","hen","164.623",756.7,"YOUNG BIRD"
  "1029","IBUKI BROS/15","blue bar","cock","121.557",727,"YOUNG BIRD"
  "1030","Ron Geer   /7","blue bar","cock","164.617",725.6,"YOUNG BIRD"
  "1031","VICTOR SAN/31","blue bar","hen","105.645",714.3,"YOUNG BIRD"
  "1032","NEZ-REE LO/11","complex","cock","106.112",714,"YOUNG BIRD"
  "1033","RIC ARRISOL/5","unknown","hen","97.485",699.8,"YOUNG BIRD"
  "1034","TLC LOFT   /4","blue bar","hen","131.100",654.1,"YOUNG BIRD"
  "1035","ARAMIS ALBA/6","complex","cock","92.899",574.3,"YOUNG BIRD"
  "1036","Matt Hazen /3","blue check","hen","165.491",490.5,"YOUNG BIRD"
  "1037","BLUE DANUB/27","complex","hen","102.616",1369.3,"YOUNG BIRD"
  "1038","BRUCE GORD/19","blue bar","cock","98.451",1366.7,"YOUNG BIRD"
  "1039","KARL WOHLMA/8","blue check","hen","94.467",1364.3,"YOUNG BIRD"
  "1040","KARL WOHLMACH","dark check","hen","2/8",1364.1,"YOUNG BIRD"
  "1041","KARL WOHLMACH","blue check","hen","3/8",1363.9,"YOUNG BIRD"
  "1042","BRUCE GORDON","blue bar","cock","2/19",1354.6,"YOUNG BIRD"
  "1043","Jack Chavi/11","blue check","cock","98.644",1343.9,"YOUNG BIRD"
  "1044","FLORIN POT/12","red check","hen","105.315",1343.6,"YOUNG BIRD"
  "1045","Jack Chavis","blue bar","hen","2/11",1343.4,"YOUNG BIRD"
  "1046","FLORIN POTRA","complex","hen","2/12",1343.2,"YOUNG BIRD"
  "1047","FLORIN POTRA","blue bar","hen","3/12",1343,"YOUNG BIRD"
  "1048","E&S GRABANS/7","complex","hen","109.075",1339.2,"YOUNG BIRD"
  "1049","BRUCE GORDON","blue check","hen","3/19",1333.2,"YOUNG BIRD"
  "1050","BRUCE GORDON","blue bar","cock","4/19",1332.7,"YOUNG BIRD"
  "1051","BRUCE GORDON","blue check","hen","5/19",1332.2,"YOUNG BIRD"
  "1052","BRUCE GORDON","blue check","cock","6/19",1324.9,"YOUNG BIRD"
  "1053","BRUCE GORDON","blue bar","cock","7/19",1324.6,"YOUNG BIRD"
  "1054","BRUCE GORDON","blue check","hen","8/19",1324.4,"YOUNG BIRD"
  "1055","Terry Dry /15","blue bar","cock","150.942",1319.2,"YOUNG BIRD"
  "1056","BRUCE GORDON","blue check","cock","9/19",1318.5,"YOUNG BIRD"
  "1057","KARL WOHLMACH","blue bar","hen","4/8",1318.5,"YOUNG BIRD"
  "1058","BRUCE GORDON","blue bar","hen","10/19",1318.3,"YOUNG BIRD"
  
negative.code: "1388","B Crossen","blue check","hen","Mar-66",1576.6,"OLD BIRD"
  "1389","B Crossen","blue bar","hen","Apr-66",1576.3,"OLD BIRD"
  "1390","B Crossen","blue bar","cock","May-66",1575.7,"OLD BIRD"
  "1391","Lees W C3","blue check","cock","101.491",1575.6,"OLD BIRD"
  "1392","Steve Putma","complex","cock","96.793",1575.2,"OLD BIRD"
  "1393","Jack Chavi0","complex","cock","109.722",1574.7,"OLD BIRD"
  "1394","Bill Harve5","blue bar","cock","104.86",1573.7,"OLD BIRD"
  "1395","Mike Strev5","blue bar","hen","162.859",1572.3,"OLD BIRD"
  "1396","B Crossen","blue bar","hen","Jun-66",1568.9,"OLD BIRD"
  "1397","B Crossen","blue bar","hen","Jul-66",1568.5,"OLD BIRD"
  "1398","Leonard Lee","blue check","hen","Nov-88",1568,"OLD BIRD"
  