We're doing our best to address a neighbor issue. Our 11 hens and one roo are in a closed wooden house all night, but we're still getting complaints. (Frankly, I don't think it's loud at all, but we're trying to be good neighbors. We're in a rural area and all homes are on at least one acre lots, and there are roosters everywhere. Other roosters who are in the open crow louder than ours and it carries through the whole neighborhood much louder than ours. But we don't want to have a feud if we can avoid it.) So I'm checking into ways to insulate the walls to help muffle the crowing. I did some searching here and found lots of posts about insulating for weather and how the chickens will peck at and eat the pink foam fiberglass insulation, and the only way to prevent that is to cover it with plywood. Are there any other options for sound insulation? Weather is not an issue for us (SoCal). I remember as a kid my friends who played drums used to tack up paper egg cartons on their walls and that supposedly helped. But I wonder if they'd chew on that, too. So does anyone have any ideas for either a type of effective sound insulation that they either will leave alone, or if they do peck/eat, it won't harm them? Thanks everyone!