Sean The information you gave is somewhat sketchy. If I had more to go on I'm sure I could help you. Was this a rifle hunt or bowhunt? I'll assume it was a rifle hunt which would mean this must of happened in the early part of the season. First of all a bark is a warning signal, and they will leave immedatley so it could'nt be that as you said they did'nt seem threatened. Then you mentioned they chuckled. A bull usually chuckles for two reasons. One, is he's looking for companionship, preferably cows but another bull would due if he's been alone for awhile. Two, and the most common reason is a herd bull will chuckle to keep in contact with his cows so they know where he is and won't feed to far away from the herd. This does'nt sound like the situation you were in, so I would guess and say what you heard was a sound I call popping grunts they sound something like chuckles and are often mistaken for them. These type of grunts are made when a bull is aware of something but is not sure what it is. They obviously did'nt smell you. Because they hung around. When a bull makes these sounds he's asking you to identify yourself or show yourself if something does'nt step out that satisfies him he will leave the area in 10 to 15 sec. If this answer does'nt satisfy you please be more detailed about your question. Also click on my web page, it may help. elknut1
www.elknut.com
Bugling Bulls & Beyond!