Mollie leaves Animal Farm because she has never fully embraced its new way of life, and she instead prefers the benefits of being owned by humans. Of all the animals, Mollie has not risen to the demands of Animalism. She sneaks sugar and ribbons, shirks her duties, shows up late to work, and maintains contact with humans. After she leaves Animal Farm, the pigeons see her in town, pulling a dogcart while a human strokes her nose and feeds her sugar. These details show that Mollie chooses to sacrifice her liberty for comfort.