Someone here HAS to have done this before. I bought some mature birds from a breeder. She shipped them to me in Horizon bird boxes. Part of the deal was for me to send the boxes back to her. But how? It seems like it would be expensive to ship them (even empty) unless I break them down flat, but they are all glued. Has anyone broken them down and then reassembled them before, or does that ruin them? Any advice is appreciated! Thanks!