(this forum looks old, I hope it's ok to still post in it...)
I would be a little concerned about people stealing birds.
Last week at one of our local fair shows, a week long show, some one stole one of my friends birds (a white silkie male.) They are just getting started in poultry and naturally they've made pets of them, so it was quite devastating for them to have their bird stolen. A few years back one of our judges, an ABA judge Robert Haws had one of his Plymouth Rock bantams stolen a silver pencil male I belive. This was at a 3 day show. We have watchers too at thease shows, but, I guess it's not enough.
I've never had one of my birds stolen, but I've recently become very concerned, Im going to try and do zip ties on the coop dors. even though anyone with a knife could cut the zip ties and get right in, they may have to tamper with the zip ties just long enough for a watcher to notice. Thats the best I can hope for anyway. To me the bird it self is more valuable then the prize or money it may win, especially if it's one you use, or plan to use in your breeding program.
One other option some times people do... lets say you have a bird that wins Best of Breed for example, you can swap that bird out with another one of lesser value to you. If you wanted you could do that with all the birds you entered, providing you have enough birds to swap them out with the same breed/variety/sex/etc.
If anyone has any other ideas or recommendations
on keeping birds safe at the shows I'd love to hear them too.