Animal feed is food given to domestic animals in the course of animal husbandry. There are two basic types, fodder and forage. Used alone, the word "feed" more often refers to fodder.

Bird food is food (often varieties of seeds) eaten by birds. The most important use of bird feed globally, is as feed for domesticated poultry. However (especially in developed countries), people also make or buy bird food to feed to pet birds or use in birdfeeders for wild birds. Birdfood can be natural or commercial. The choice of what to use as birdfood depends on the species of bird being fed. Bird food can also potentially attract rodents.

Black sunflower seeds are highly recommended for use in bird feeders because they attract a wide variety of birds, have a high ratio of meat to shell, and are high in fat content. Other common birdseeds include Niger, or thistle seed, a favorite of goldfinches, millet for sparrows and juncos, and safflower for cardinals, among others.