Recent research shows that the African crested rat has hair that secrete cuare, a substance used by native hunters in Africa to kill elephants! Link to the actual scientific paper presenting the research is embedded in the New York times article. The article also describes toxins used by other mammal lineages.
http://www.nytimes.com/2012/01/31/s...a-toxic-punch.html?ref=science&pagewanted=all
http://blogs.discovermagazine.com/n...poison-on-its-fur-dares-predators-to-bite-it/
http://www.nytimes.com/2012/01/31/s...a-toxic-punch.html?ref=science&pagewanted=all
http://blogs.discovermagazine.com/n...poison-on-its-fur-dares-predators-to-bite-it/