For Cattle:
* Corn: The most common feed grain for cattle, especially in the U.S.
* Soybeans: A source of protein and oil for cattle feed.
* Alfalfa: A high-protein legume used for hay.
* Wheat: Another grain used in cattle feed.
* Oats: A good source of fiber and energy.
For Pigs:
* Corn: A major component of pig feed.
* Soybeans: An important source of protein for pigs.
* Wheat: Used in pig feed, particularly in Europe.
* Barley: Another grain used in pig feed.
For Poultry (chickens, turkeys, etc.):
* Corn: The primary ingredient in poultry feed.
* Soybeans: A key source of protein for poultry.
* Wheat: Can be included in poultry feed.
* Oats: Can be used as a fiber source in poultry feed.
For Sheep:
* Alfalfa: A major component of sheep feed.
* Grass: Many types of grasses are used for grazing sheep.
* Oats: A good source of energy and fiber.
* Wheat: Used in sheep feed, particularly for lambs.
Other Crops:
* Sorghum: A grain used in feed for various livestock.
* Rye: A grain used in feed for some animals.
* Milo: A grain used in feed for various livestock.
* Cottonseed: A by-product of cotton production, used as a protein source in animal feed.
This is just a partial list, and the specific types of crops used can vary based on geographic location, animal type, and other factors.