Don't think there's many that open up mate, better off with a beagle spaniel
with bushing , surely a quiet dog better , as dogs opening up, only pushing game out early , any fox or rabbit wont hang about with lot of noise , they move up and out before you dogs or guns are there. ive seen lots of birds,rabbits and the odd fox pushed out with good springers , and deff with rabbits they seem to hang back more than a fox or birds, springer quite and does the job quick/ silent and gives great sport . another good busher were border terrier seen few of them on shoot days good little