In 2009, Maine passed legislation that prohibited the use of gestation crates and veal crates by 2011. 

Barring a few exceptions, the law stipulates that “a person may not tether or confine a covered animal for all or the majority of a day in a manner that prevents the animal from: A. Lying down, standing up and fully extending the animal’s limbs; and B. Turning around freely.” This means calves and sows must be able to lie down, stand up, and fully extend their limbs without touching the sides of their enclosure, and turn around freely in their enclosures without impediments, including tethers.