For example, there's an ice cream shop in Baltimore called Pitango Gellato, that worked with their egg distributor to design a large roving chicken coup on wheels. During the day, they actually wheel out the chickens onto a large grass pasture, and let them roam around free. At night, the chickens go back into the coup, and get driven home. Chickens are happy playing in the nice green grass, and the producer actually saves money because he rents the chickens out to fields that need help clearing insects, same as sheep get rented out to trim grass. In the end, Pitango doesn't pay that much more for their eggs, but their eggs taste much better, and they can advertise by bragging where their eggs come from, and the cool farming system they use.