As soon as the fine weather arrives, the breeders of Basse-Normandie release their livestock around Carentan until autumn. Community lands are reserved for them within the Marais du Cotentin et du Bessin Regional Nature Park, created in 1991. There, their cows and horses thrive on pastures covered with fatty grass and enjoy freedom for five months. This system also frees up their meadows to harvest winter fodder and maintain the marshes.