First, do people really use bark collars on horses? I have never heard of that, and don't think I would do it anyway...I would rather live with the calling.
Second, flying B, your response is very similar to what I have heard from many people, and hence, the reason for my dilema. I have heard many times, "stallions are not to call at all". I have also heard more than once that they don't feel pain - I think it may be not that they don't feel pain, but that they can become more distracted, and the standard level of correction may not always get their attention during that time (of course we have a mare who is less responsive to a smack on the chest than my stallion :) )
Third, those of you who suggest letting it go, tell me honestly how you would feel at a show (where you yourself may be stressed about your upcoming events) with a known stallion who kept calling outloud - possibly causing your horse to call back. This is my concern!
I honestly think that he will grow out of the kind of calling he does at the shows, because this year, he has not done it at all when I am in saddle, only when I am leading him, and especially when he is at the trailer. I would like to get him to quit doing it when I am leading him - you have no idea how peircing it is on my ears.
So really, my problem is my ears and the apparent uneasiness of other people. It seems that many people in my area really do feel that YES, some horrible stallion behavior will follow his calling (even if they have calling horses themselves). Once people get to know him, they really do relax around him, which helps a lot - so maybe just giving the people experience around him is half the battle :)
I need to reitterate - the calling I am discussing is like the calling of every other horse I hear (just a bit more frequent than most). His lusty stallion grunts and calls are basically reserved for when he is in his pen/with a mare. When he begins eyeballing our mare, and I can see him begin to want to talk to her in his stalliony way, usually a strong "no" in my special tone is all it takes to get him to begin eyeballing me and say, "what, I wasn't talking to her, I promise" :)
I am not overly harsh on him because he is a stallion, but I am very strict with my expectations of his general behavior. I have had many people compliment me on how well mannered he is in public - he is just a bit noisy :)
I think this is funny, because I never gave calling a second thought with my geldings and mares - I hardly even noticed it - it was just horses being horses. Now, various advice and opinions about how to handle stallions has gotten me so worked up about this subject.
Here are some photos of him to lighten the mood (I love sharing photos).