I have known about the bison slaughters that happen outside of Yellowstone for a while, had a chance to met a wonderful soul on Twitter, who was running a marathon to raise awareness about our bison, and the Buffalo Field Campaign.
This situation breaks my heart.
I can not direct you to a petition or an NGO to help, but I can ask you to please follow: runningforthebuffalo @running4buffalo if you are on Twitter.........
Let's help our bison.
Deal allows Yellowstone bison slaughter, sparing 25 males for tribes
Questions & Answers about Bison Management
Who manages Yellowstone bison?