My Roadtrek wrote:
Always good to narrow a broad statement.
drsolo, your link didn't work, here is one that does.
http://npic.orst.edu/factsheets/rodenticides.html
I fixed the link in my previous post. True, I didnt know strychnine was not banned for sale already. But basically the anti-coagulant type of poisons are unlikely to kill predators either domestic or wild by secondary ingestion. This idea has been widely disseminated by non-scientists and what I call the dedicated pet aficionados who endlessly repeat online what they think they understand without checking for factual information. So, for example, it is now "well known" that ingestion of grapes can kill dogs. News to me since my dogs have always et grapes inside and pick their own outside as they drop from the grapevine and have never suffered kidney failure. This admonition started with a couple anecdotal reports by owners when pets in kidney failure were brought into the vets. At least I cannot find any bona fide scientific articles on tests done. As a scientist and retired teacher I cannot stop myself from correcting myths when they land in my lap.