What Do You Get From The Fat Cow

Son: Mom, I got suspended from school today.
Mom: For what reason?😠
Son: The teacher asked us, “What do we get from the chicken?” I said eggs.
Mom: Then?
Son: The teacher asked us again, “What do we get from pigs?” And I said bacon.
Mom: Okey, then?
Son: And when she asked, “What do we get from the fat cow?” I said homework.