Victory: City by city, we just ended gas chamber euthanasia in the U.S.

In October 2025, the Green River, Wyoming City Council voted unanimously to ban the use of gas chambers for animal euthanasia, officially ending the practice in the city.

The 7–0 vote on October 7 followed months of sustained public pressure tied to Animals’ Angels’ campaign to shut down the country’s last remaining gas chambers.

Councilmember Pete Williams acknowledged the scale and intensity of that outreach, including the nickname used for the mayor in Animals’ Angels’ advocacy materials:

“I got a few really, really radical emails over the last six months. They called us Nazis. They called us genocide, they were calling us all kinds of names, different organizations. It was pretty ugly, and they had a nickname for our mayor, called him ‘Gas Chamber Pete.’”

With Green River’s decision, one of the final cities in the United States still using gas chambers ended the practice. Shortly afterward, Evanston, Wyoming — the only other known city at the time still using this method — also announced it would discontinue gas chamber euthanasia .

Because the Animals’ Angels community took decisive and relentless action, innocent dogs and cats will be spared a prolonged and terrifying death. This victory proves that organized, persistent advocacy works — and that even long-standing cruelty can be dismantled, one city at a time.