I have watched the hog calling videos by Glenn Guess/Convergent and it is evident that hogs will come to certain hog sounds. Don't know if it is a territorial type response, sexual/breeding attraction, curiosity, or what, but they definitely came to his call sounds all fired up.
Over the years and on several occasions I have seen a group of hogs chasing what appeared to be a sow in heat. Those hogs were very noisy, squealing, grunting, and carrying on and could be heard a fairly long ways off. If you could record or replicate that sound, I am guessing any hog within hearing would respond.
I have a fairly new Foxpro Fusion and have all of their hog sounds on it, but haven't tried it yet. I am waiting for the right situation to test the hog sounds when I am fairly confident there are hogs within hearing distance.
Are there any other good recorded hog sounds available?
Dave