i remember the first time i heard a whole pack howling,it was the most insane high pitched bunch barks,yips,howls and garble i ever heard,it can get pretty crazy sounding for sure.howler summed it up pretty good about howling.if howling is what you want to do,pick up some kind of instructional video or cassette tape and learn what the different vocalazations are and when to use them or maybe more importanly when not to use them.