Booting Cyanide Bombs off Public Lands

On July 21, Canyon’s Law (HR 4951/S 4584), a bill to outlaw the use of M-44 devices (a.k.a. cyanide bombs) on public lands, received a hearing in the House Natural Resources Subcommittee on Water, Oceans, and Wildlife. Representative Peter DeFazio (D-OR) had previously introduced the bill in the House. On the day of the House hearing, Senator Jeff Merkley (D-OR) introduced it in the Senate.

Wild Coyote hunting in a roadside meadow in the Rocky Mountains of Alberta Canada
Photo by BGSmith

The USDA’s Wildlife Services program uses M-44s as a form of predator control. In 2017, Canyon Mansfield, a 14-year-old Idaho boy, was walking with his dog, Kasey, on BLM land near his home when they accidentally triggered an M-44, which spewed cyanide on them. Canyon has lingering health effects from the exposure. Kasey, who took the blast more directly, died in agony. Canyon and his family have used this nightmarish experience to become powerful advocates against these insidious devices.

Testifying before the subcommittee, Canyon’s father, Dr. Mark Mansfield, recounted that horrific day and urged congressional action. He pointedly asked, “How many pets must be killed, how many children poisoned, and how many families traumatized before meaningful federal action is taken? I am powerless to change what happened to my son, but Congress can ensure that it does not happen to others. Is it going to take the death of a child to ban this antiquated, indiscriminate device?”

Take Action! It is time to stop endangering people, pets, and wildlife and put an end to the use of M-44 cyanide bombs on public lands. Please visit AWI’s online Action Center to urge your US representative and senators to cosponsor Canyon’s Law. Prefer putting ink to paper? Address a letter to your representative as follows: The Honorable [full name], US House of Representatives, Washington, DC 20515. Address a letter to each of your senators as follows: The Honorable [full name], US Senate, Washington, DC 20510.

Q article single.

Program Terms: Companion Animals, Terrestrial Wildlife

AWI Quarterly Terms: Government/Legal, Quick Read

Related News

Published: October 10, 2025

IUCN Reaffirms Long-Tailed Macaques’ Endangered Status Despite Industry Pressure

In Program: Terrestrial Wildlife

The International Union for Conservation of Nature (IUCN) today released an update to its Red List of Threatened Species. The update revealed that the long-tailed...

Published: October 6, 2025

AWI Awards Safe Havens for Pets Grant to Support Unhoused People and Pets in DC

In Program: Companion Animals

This Domestic Violence Awareness Month, the Animal Welfare Institute (AWI) is pleased to announce a $15,000 grant to the Humane Rescue Alliance (HRA) to support...

Published: August 21, 2025

AWI Funds Research to Alleviate Human-Wildlife Conflicts, Animal Suffering

In Program: Terrestrial Wildlife

The Animal Welfare Institute (AWI) announced today the eight recipients of its Christine Stevens Wildlife Award who are developing humane solutions to human-wildlife conflicts and...

Published: June 24, 2025

Refuge from Cruel Trapping Act Reintroduced to Protect Wildlife and Pets on Public Lands

In Program: Companion Animals, Terrestrial Wildlife

The Animal Welfare Institute (AWI) endorses the Refuge from Cruel Trapping Act, reintroduced today in the US House of Representatives by Rep. Jerrold Nadler (D-NY)....