I never heard a buck growl either till last year untill October 27th. I was sitting in my climber about 18 feet in a tree and was just outside a bedding area. It was about 30 minutes before dark and I hit the rattle bag for about 1 minute, waited about 10 minutes and hit it again and I heard the most awfull soundI have ever heard in the woods. Being that we had some bears on our property last year it crossed my mind that it could be a bear running in or from something. Then I spot the source from which the sound came from, It was a buck.He wasnt running he was trotting. And he kept doing this. I will never forget that awful sound. I thought he was a sick buck so I said to myself, im going to take this sick bas*ard out of our herd. The sound wasnt a grunt, ive heard bucksgrunt many many many times andthis was no grunt. This buck was plain out pissed. After I made the shot he trotted off,not run, but trotted. Iheard him continue tomake this noise up untill he let out a death cry. I described this sound to my fater in law and he said he had never heard anything like, he figured he was sick too. Upon dressing this deer and butchering and sending the head in for cwd testing, we found this buck to be 100% healthy. The next day I decided to make a trip to a local deer farmer who has some pretty big bucks about 5 miles from my land and I asked him if he had ever heard this sound before. WhenI described he knew what I was talking about. He said he has some mature bucks that will make that sound when the does go into heat and they begin chasing. Usually in early Nov -mid Nov. He said that not all the bucks he hasmakes this sound only the deer he has that are 2 1/2 years old and older. While I was there I wasnt able to hear any of his bucks make this noise, I wished they would have. He wasnt sure why they did this but thought it was some sort of emotional sound. Well here it is a year later and the buck growl comes out. This is a very close replication of the sound that was heard on Oct 27th 2005 when I shot this buck. To this day this soundsend chills throughout my body. It works!