It's because not everybody can have a louisiana yard dog. Real deal, growing up I had 3, a friend of my grandpa's caught them while trolling an gave them to me. You learn their language, the momma rumbles with a low pitch they come running, they grunt with a high pitch momma comes a charging and bellowing. They grunt with a low pitch when they feel safe or want FOOD. I guess it's since they have so few sounds, they use volume to describe intention. Anyhoo, pick up that guitar an go to strumming my friend, when you become rich an shameless, remember us, ur lowly friends..;)