Originally published on EquusMagazine.com Of the hundreds of toxic plants in North America, only a handful are likely to bring serious harm to horses. Here are the ones most dangerous to horses in the United States. Take a stroll through any pasture, and there among the grasses you'll find any number of different plants. Small vines, broad-leafed weeds, some wildflowers you recognize--some you don't. And, as disquieting as it may be to contemplate, the chances are pretty good