I THINK ITS MORE OF EXPERINCE, THAN BRAINS. Most lurchers take them out enough [day+night] soon pick it up. You need a bit of brain, a 1/4 from collie's, or other breeds is plenty enough.?? The sences = from most lurchers [nose,sight,chase,kill,] is [instinct], just that bit of brain helps thats all, maybe to retrieve and a bit eaiser to train.??