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This is the inside of a livestock transport container, on demo at the show courtesy of the local ferry company. It includes several delightful features, including some odd flaps midway up the walls, which you can see on the right side of this photo. I asked about those. When transporting sheep, they provide crucial ventilation and are kept open, but when transporting cattle (which are considerably taller than sheep), they turn out to be poo flaps and it's best to keep them closed.