Blue Seal articles on nutrition: http://www.blueseal.com/techtalks/equinetechtips.htm
Hay Net: http://www.fsa.usda.gov/haynet/havehay.asp
Find hay available for sale in your area.
Horse Hays: http://www.theequinejournal.com/issue41/horsehayart.html
Information on why roughage is important to the horse's gut and on many different types of hay. Excellent starting point in researching the hays available to you. Written by Dr. Frederick Harper, Extension Horse Specialist, University of Tennessee
Internet Hay Exchange: http://www.hayexchange.com/
Myths and Reality of Beet Pulp: http://shady-acres.com/susan/beetpulp.shtml
Safer Grass: http://www.safergrass.org/
"Information on the current research and prevention of grass founder in horses."
Springtime, Inc.: http://www.springtimeinc.com/live/