_Feeding Track._ On many of the larger duck farms, a feed track is employed in feeding the stock. Such a track consists of a framework of sufficient strength to support a car filled with mash which is pushed along the track by hand. The track leads from the feed mixer across the various yards where the ducks to be fed are located, including both the breeding ducks, yard ducks and brooder ducks in yards. This involves a considerable amount of trackage which must be fairly level and which runs over the yard fences or along the ends of the yards so that the feed can be shoveled directly from the car into the feeding trays in the yards. The use of a feed track simplifies the feeding considerably but its construction is quite expensive. Where a track is not used, the feed as mixed is dumped into a low wagon which is driven along the yards, or through them by removing movable panels in the fences and the feed shoveled from the wagon to the feed trays. [Illustration: FIG. 16. Power feed mixer. The feed is dumped into a low wagon from which it is shoveled to the ducks. (_Photograph from the Bureau of Animal Industry, U. S. Department of Agriculture._)] _Electric Lights._ Most duck farms at the present time are located where electric lighting is available. It is desirable and in fact almost necessary to have the various houses wired so that lights can be turned on when desired. In addition, lights are usually provided in the yards for fattening ducks and are used at night and especially during storms to keep the ducks from stampeding. _Water Supply._ An adequate water supply is essential. This will consist of a well or spring furnishing an ample amount of water, a power pump and a water supply tank. From the tank, the water must be piped to the incubator cellar, the brooder houses, the killing house, the feed house and to any of the yards where the ducks do not have access to a natural supply of good water. In addition, of course, the water from the same tank is usually used to supply the residence. _Fences._ Not a great deal of investment is necessary in fences since the yards are rather small and the fences are low. Two-foot fences of two-inch mesh wire are used for the yard ducks while for the little ducks 18-inch wire of one-inch mesh is used. The biggest items of expense connected with the fences are the cost of the stakes or posts used in their construction and the labor used in this work. The portion of the yards extending into the water are the most troublesome and most expensive to build. In some cases, rather elaborate wooden picket fences are used in the water yards. These are more permanent but are more expensive to build.