In January, the state of California reported that out of 68 mountain lions that were found dead in the wild between November 2015 and December 2016, all but four had traces of one or more anticoagulant poisons in their livers — the kind of poisons that people put out to kill rodents in their yards. This summer, hikers discovered two dead foxes, with no wounds or other obvious reasons for death, in the Arroyos & Foothills Conservancy’s Millard Canyon Preserve in Altadena. Another hiker observed a bobcat walking in circles, seemingly catatonic.What do these events have in common? Rat poison. While we didn’t test the foxes, our biologist experts tell us that they, like the mountain lions, were likely victims of anticoagulant rodenticides.