For anyone contemplating changing laws to correct problems, you need to take a step back and think really hard. We have so many insane laws on the books already because we as a people have come to this point where we think the law is there for every little problem. We become much more defensive, and so do the neighbors. folks, we are all human here. Everything we are begins and ends with the individual. We all have our rights, but it is OUR responsibility to come together and find ways to live as communities. Seeking changes in laws destroys communities and neighborhoods, and puts everyone involved on edge.
I suggest trying to stop by and talk to him, not combatively, but friendly. Ask if you can "visit" his boys, and learn about them. Mention politely that they are pretty loud, and you have no interest in deterring him from exercising his right to keep them, but you are trying to find away to cut down on the noise. Maybe he has been through it before, and that's why he is where he is. Tell him you were thinking of putting in some evergreen trees like leyland cypress that would grow fast and thick to alleviate some of the noise. You wanted to mention in advance so that he didn't think you were trying to hide behind a wall. You might even ask politely if he minds helping plant them. By not putting the burden straight on to him, you are being less combative, and may very well come to be friends with someone. If you live in the country, its your responsibility to protect your peace and quiet. Country living means livestock and the associated smells and sounds. It also means knowing you are closer to predators that can endanger you own livestock. Furthemore, it IS ABSOLUTELY not mine or anyone's responsibility to protect YOU from OUR property. Next thing you know someone will start passing laws or filing lawsuits against neighbors because they are allergic to certain grass. I am actually surprised that has happened yet.