You hear the same saying Snoops be it with Lurchers, Coursing Greyhounds or Track Greyhounds ie the Bitch is more important ? Me personally i believe its an old wifes tale, the Sire and Dam are as important as each other, the Chromosomes DNA whatever is split 50/50 , breed from proven stock that is proven over generations (a good bloodline) if possible, definatly breed from parentage that could do the job your breeding for ( pointles breeding from X and Y just because its the easy option and they are maybe yours and your next door neighbours dog ect) There are no guarentees with anything but g