Mobile barn units with wheels attached thereto, namely, modular and prefabricated animal houses for animals such as cattle, cows, steers, calves, pigs, sheep, goats, chickens and turkeys made primarily of metal, but also featuring non-metal components; barns that are configured to travel over strips of forage crops in a field, namely, modular and pre-fabricated animal houses for animals such as cattle, cows, steers, calves, pigs, sheep, goats, chickens and turkeys made primarily of metal, but...