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 1485 and influenced its cultural and economic development. Rouen became a regional centre of production by introducing a variety of books to the industry. Although it did not have a university, Rouen became an important intellectual centre by reason of its reputed schools of higher learning. In 1734, a school of surgery was founded (second only to that of Paris, founded in 1724). In 1758 a new hospital was opened, to the west of the town, which replaced the old medieval one which had become too small. During the Franco-Prussian War of 1870-1871, Rouen was occupied by the Prussians. During