Hi, I'll be taking some spare roos to be processed very soon. I have a transport cage with one door, on top. Any tips or tricks for getting the birds into the thing? Last time, I used dog crates and it was easy - only getting them OUT was a pain. I don't like to inconvenience my processer guy, so I bought the cage...only now I think I'm the one being inconvenienced! Which is ok, but can anyone give me hints about how to load my birds the easiest way? Thanks!