We are planning to take our chickens with us on vacation, but it's going to require a two-hour drive. I'm planning to transport them in the brooder. It will be a little bit of a tight fit (in the brooder) while in the car, and I've never tried to move them before. We are also going to change altitude from about sea level to about 7,000 feet. Is there anything I should worry about? What should I do to help manage their stress?