Look it up.
Here are the books I have on the topic:
Clinical Veterinary Toxicology
G. Lorgue, J. Lechenet, Jim Riviere
Wiley-Blackwell 1996
International Poisonous Plants Checklist: An Evidence-Based Reference
D. Jesse Wagstaff
CRC Press, 2008
Handbook of Poisonous and Injurious Plants
Lewis S. Nelson, Richard D. Shih, Michael Balick
New York Botanic Garden / Springer Science, 2007
Poisonous Plants: A Handbook for Doctors, Pharmacists, Toxicologists, Biologists and Veterinarians
Dietrich Frohne, Hans Jurgen Pfander, Patrick McKinney (Editor), Inge Alford (Translator)
Timber Press, 2005
'Mind-Altering and Poisonous Plants of the World'
Michael Wink, Ben-Erik van Wyk
Timber Press 2008
