When I bought an adult chicken and put him in a box he was so quiet. Didn't make a sound. So, I think that people don't realize the big boxes have chickens in them. My chicks are really loud, but I don't think the adults are loud at all. When my dh was at the New Orleans post office they said they have a specific place inside to keep the live animals. They didn't see my boxes there yesterday. So, this tells me that they are not being treated as live animals, or someone just missed seeing them where they were supposed to be. Maybe I should find a chirping chick and stick it in the box from now on ?