A taller dog, as long as it's agile, is going to be of more use than a smaller type in alot of situations, especially lamping on ground with a fair amount of roughish scrub/cover or whatever, due to a better field of vision due to it's height, more so when you're after a few mice! lol
But we ain't talking small dogs we are talking dogs at 26ats,hardly small and able to do everyything a taller dog can