Focus on heritable performance – use EBVs I’ve had an unusual path to sheep breeding, which means few preconceptions! Along the way one of my missions was helping launch SIL. View Work with a breeder who uses SIL or Breedplan Some people feel estimated breeding values (EBVs) from a genetic evaluation system like SIL or Breedplan are an unnecessary complication, and prefer visual selection. View Align breeding values to your farm management goals Gary Basher (pictured with wife Elizabeth) spent four decades developing Howard Head farm in Upper Moutere with a breeding programme to reflect a very particular environment. View