Poisonous Plants

What weeds, trees, and shrubs are poisonous to your horses?

Just about every pasture or horse property on the planet has undesirable plants or weeds on it. What weeds, trees, and shrubs are poisonous to your horses? What do you do if your horse has eaten one of them? How can you get rid of those weeds?

About the Experts

Anthony Knight, BVSc, MS, Dipl. ACVIM

Anthony P. Knight, BVSc, MS, Dipl. ACVIM, is a professor of large animal medicine in the College of Veterinary Medicine and Biomedical Sciences at Colorado State University. He received his veterinary degree from the University of Nairobi, Kenya, in 1968. After completing a master’s degree at Colorado State University, he joined the faculty in 1974. His current professional interests include livestock heath, foreign animal diseases, emergency management, and plant toxicology. He has written two books on poisonous plants of animals in North America, and maintains a poisonous plants website for use by anyone wanting poisonous plant information.

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