Animal feed is food given to domestic animals, especially livestock, in the course of animal husbandry. Animal feed is an important input to animal agriculture, and is frequently the main cost of the raising animals.

There are two basic types: fodder and forage. Used alone, the word feed more often refers to fodder.

Animal wellbeing is highly dependent on feed that reflects a well balanced nutrition. Some modern agricultural practices, such as fattening cows on grains or in feed lots, have detrimental effects on the environment and animals. ​