There are people who are out there that will do that on purpose, sad to say. I am ashamed to say that I accidentally left one behind myself at a show this year, because she blended in right with the shavings in the coop...I usually walk the aisles several times and had two other people in my party do the same to be sure no one/nothing was left behind, and all three of us managed to overlook her. Thankfully, the show notified me and I had arrangements made for the bird to be shipped home to me before I even got home...if I hadn't already been over halfway home, with dark coming on and totally exhausted, I would have turned back for her. I would like to publicly thank the folks at the Gateway, Indiana show for their help in getting her back to me safe and sound...there are good people left in the world and they are some of them!