Louisiana State University Ag Center (Forage Testing)
www.LSUAgCenter.com/en/our_offices/research_stations/Southeast/

National Pesticide Information Center
NPIC.Orst.edu/npicfact.htm

United States Department of Agriculture (USDA) Natural Resources Conservation Service
Plants.USDA.gov

Cornell University Poisonous Plants Information Database
Ansci.Cornell.edu/plants/index.html

Maryland Small Ruminant Page: Poisonous Plants and Other Plant Toxins
www.SheepAndGoat.com/poison.html