Khaki Campbell ducks seldom hatch out others' young; however, in very communal situations do hatch large broods together. Most brooding behavior has been sacrificed in exchange for prolific egg laying ability in this breed. The ducks, when raised by hand, are not usually defensive of their eggs or nests, making collection of eggs very easy. Mechanical incubators or broody chickens are used to hatch out Khaki Campbell ducklings when ducks are not present in the process. Incubation takes approximately 23 to 28 days for a Khaki Campbell duckling to hatch and eggs need to be inspected for ducklings that have not emerged
History of Rouen In 1150, Rouen received its founding charter, which permitted self-government. During the 12th century, Rouen was probably the site of a Jewish yeshiva. At that time, about 6,000 Jews lived in the town, comprising about 20% of the total population. The well-preserved remains of a medieval Jewish building, that could be a yeshiva, were discovered in the 1970s under the Rouen Law Courts. In 1200, a fire destroyed part of Rouen's Romanesque cathedral, leaving just St Romain's tower, the side porches of its front, and part of the nave. New work on the present Gothic cathedral of Rouen began, in