Folk tend to go down the greyhound route, when they are either dissatisfied or disappointed, with a certain type of lurcher..." It needs more speed, more size,.more,.whatever...."
They can see no further, than the algebraic equations, of three quarter breeds, three eights x five eights, etc, etc,..
And for those that just are 'in it' for the short term,..such an action is possibly the best way to go,..
BUT to produce a hunting dog (not merely a hare courser or a racer),... but a find-um,.feckem, fetch-um on home merchant,..well,..personaly, I would always favour using a tried and tes