What do you mean? A deerhound like a bluetick,black and tan,beagle, etc. will have a long bawl mouth when he opens on a track. a running or treeing walker will have choppy,short bark usually. The problem has been stated above about hounds taking the freshest track available and not actually bloodtrailing a deer. I use hounds because i already have them and they work great, they wont bark much if you have them on a leash anyway while bloodtrailing.