The Organic Chickens Yahoo group can be found here: http://tech.groups.yahoo.com/group/OrganicChickens/
Another option is whole grain mixes. Info about it here:
http://www.mofga.org/Portals/2/Reports/MOFGA%20FS%2013%20Feeding%20Whole%20Grains%20to%20Chickens.pdf
and here (sorry, you'll have...