In many parts of the country hunts use drainage rode to bolt foxes, that shows how much pressure a terrier has to give to bolt a fox, don't get me wrong if you have a good bolting terrier, well done hard to come by!! same to be said about a good digging dog in my oppinon even hard to come by, but in all honesty you can NOT compare the both, I know what Type i Choose to feed!! as for fd bring a grass that is complete utter ballox, and someone should only be accused of that if its a cert, I'd put my last pound on fd not being one!!!!! In fairness I've hunted with him personally, iv enjoyd his a