Interesting article on the historical use of acorns as food in California. It also has nutritional analysis.
http://webcache.googleusercontent.c....doc+acorns+chickens&cd=3&hl=en&ct=clnk&gl=us
http://webcache.googleusercontent.c....doc+acorns+chickens&cd=3&hl=en&ct=clnk&gl=us