Anticoagulant rodenticides (AR) exposure is pervasive in carnivores, with direct and indirect effects on survival. Bobcats in Southern California are more likely to die from mange following AR exposure. While prohibitive legislation has recently been passed, a complete ban to prevent further wildlife poisoning requires demonstrating causality. We will combine advanced molecular methods with a non-invasive exposure assay to demonstrate the causal link between mange and AR exposure in bobcats.