http://www.change.org/petitions/usda-prohibit-the-use-of-sodium-cyanide-and-compound-1080
To address private livestock interests, the USDA has been using two highly controversial poisons, sodium cyanide in M-44 devices and Compound 1080 in livestock protection collars, to kill livestock predators. As a result, many nontarget wild animals such as wolves, bald eagles, and endangered California condors, in addition to pet dogs, have died. Over the past few years, at least half a dozen wolves have been killed by these poisons.
This is the address for the Care2 article
http://www.care2.com/news/member/729790807/3395017