
Coffee,chocolate, tea or any other caffeine - contain caffeine , or theophylline, which can be toxic and effect the heart and nervous system.
Grapes and Raisins - Contain an unknown toxin , which can damage the kidneys
Large amounts of liver - Can cause Vitamin A toxicity, which effects muscles and bones
Mushrooms - Can contain toxins, which may effect multiple systems in the body , cause shock and result in death
Check this link out hopefully it works, if not still check it out :)
[link http://www.peteducation.com/article.cfm?cls=2&cat=1661&articleid=1030]
How come my links are not working :(