Hi, we hatch eggs for local breeders and then send them back. I need a simple and easy way to transport the chicks the short way in my vehicle. Often, we have about 500 chicks/ducklings at a time and groups of 25 or more on the breeds. I'd really like to find the Happy Meal style boxes that feed stores use as I don't need the super heavy boxes. It has to be cheap because I won't take boxes back and reuse them for bio-security reasons. I am open to using a plastic method as those could be sanitized. Any suggestions? I have been combing the internet for weeks with no avail.