https://www.agriculture.arkansas.gov/wp-content/uploads/2020/05/FPFS4_poisoning_New_South___Whales.pdf from an article on poison use in feral hog populations in Australia, where the use of poisons has been in place for decades.
"Other toxins, such as CSSP or SAP (yellow phosphorus) and warfarin,
are being phased out nationally due to animal welfare and non-target concerns."
https://www.agriculture.arkansas.gov/wp-content/uploads/2020/05/The_Wildlife_Professional_Is_Kaput_Kaput_September_2017.pdf The government attempted to fast track Warafin Poison in Texas before, and this seems to be more of the same.
