Only seen a few work,
My mate has one of them first x heartbreak bred dogs must be 10/11 now, Bout 22''/23'' decent enough little dog for ferreting/lamping/moochen/ took r,h,f,d all singlehanded but never had top end really for hares and deer in open land if you wanted them regular but he is one for the pot type so didnt really mind Rabbits were his bread and butter and he was a decent little rabbit dog day/night, Fox he woul kill with pleasure see him kill many over plenty of seasons even at 10 he was still retreving them,
The above dog was mated too his Fell/Whip, And the pup he kept