In my early 20's I was living and working on a big golf course...every Sunday on my day off I used to go digging, gentleman that owned the place had a big Ridgeback bitch called Zena,used to tag along with us,she would mark foxes to ground,in the 3yrs I was up there,that Ridgeback never gave a false mark,she was on par with lurchers I've owned for marking stuff to ground....she would join in and bust stuff up above ground,hell of a bite on the bitch TBF...and to this day,one of the scariest dogs to be around when it got dark,and it was in guard mode would literally smash through doors to get