I agree with goatlady. Also you can save some store bought feed and give you chickens hard boiled eggs, they love them. Just make sure to crumble them up a bit so the shells don't look like.....well...shells.
"A strong body makes the mind strong. As to the species of exercises, I advise the gun. While this gives moderate exercise to the body, it gives boldness, enterprise, and independence to the mind. Games played with the ball, and others of that nature, are too violent for the body and stamp no character on the mind. Let your gun therefore be your constant companion of your walks." Thomas Jefferson, letter to Peter Carr, Aug. 19, 1785