I am definatly not an expert about dogs,especially drug type dogs,but I have been hunting deer with dogs since I was a kid in Miss. back in the 60's.Different breeds of dogs hunt differnt ways.I have seen dogs circle all around and thru an area before finding the deer,and I have seen dogs go straight to deer.If there is a difference in the way domesticated dogs hunt,surely there is a difference in the way a predatory animal hunts.I am glad to see there is a study on this matter because it is becoming a real problem.