I agree, there are many of us who still use dogs of the old curdog working style to work cattle and hogs. Those traits are being breed out by todays hog hunters.
Here is an old pic of 6 of my dog holding up a sounder at bay. They held them for some time and I watched for a while before I sent in a catch dog. They work them ust like catttle circling and bunching, bringing any runners back to the bay and holding them there. I am sure that if I had had any kind of a fence to throw them against I could have driven and pened they easy.