Our cattle live outside 365 days a year and eat grass grown on our farm. About 7 months a year, they eat grass as it is growing in pasture; in the colder months, they eat hay that we've harvested from our own fields. They drink water from the same well system that provides the water we drink at home. We do not supplement their diet with anything other than a salt lick.
Our hogs live in a large outdoor pasture with access to a "pig house". They eat high-quality Blue Seal pig feed and a significant amount of foraged food which depending on the time of year may include apples, nuts, and root vegetables.