What would be the best way to transport mandarin ducks? they would be riding in the van; so no worries of wind. I have wooden poultry crates, plastic dog crates, cardboard boxes. What would you recommend? This is my first time transporting birds. its a 5hour drive as well. I read to give them lettuce in the boxes to nibble at for nourishment? Transporting 2 breeding pairs and 8 babies. thanks!!! Soon to be mom to some mandarins!!!