silent or open?????

I don't know what you call it but all my dogs chirp soon as they hit a track then go silent till the are facing the hog then all hell breaks loose . If the hog breaks they will go to chirping as long as they can see the hog then if the hog gets out of there site they will go silent again. I myself like this that way I know what is going on and which way they are headed.

I will not hunt my dogs with open mouth are even semi open mouth dogs cause all my dogs have some hound in them which is plott some have half some have less and it don't take much to make one go to opening up all the time . I will pick my dog up immediately if somebody's dogs go to opening up . I had a great little plott dog that was silent most his life then I made the mistake of hunting him with a open mouth type of dog and he was never the same my fault and it was a lesson learned for me a big big one !