Warfarin is the active ingredient in rat poison. Random mutations in the genomes of rats mean that some rats in a population have a natural resistance to warfarin. This causes variation in the rat ...

The Poison-Free Wildlife Act, or Assembly Bill 2552, would expand the existing rodenticide moratorium to include first-generation anticoagulant rodenticides chlorphacinone and warfarin. The state has ...

Assembly Bill 2552 now awaits state Senate approval. Authored by Assemblymember Laura Friedman, A.B. 2552 would expand the existing rat poison moratorium to include first-generation anticoagulant ...