The Necessity of Green Food.
It must be remembered that as the broods grow older the cleaning process must be repeated oftener, as their capacity for generating filth will always be in proportion to their size. Those unacquainted with duck-culture have little idea how fast these birds will grow; how soon they will successively outgrow brooders, pens and yards, and how soon every vestige of green will disappear from yards that were thickly covered with rye. But the ducklings must be kept growing at all hazards, and a vegetable supply must be procured from outside.
