Oh they're LOUD alright! Unbelievably so! They say that if you can stand them for the first year of their lives, after that they calm/quiet down. They're dumb as rocks too... one guinea will be standing in a field with the flock behind it and the one facing away will call and call for the rest of them but do you think it would just turn around and look for them? That would be too simple, or too smart, however you want to look at it! I got rid of mine!