Change.org is one of the leading petition sites for Animal Right and is endorsed by PAW

Change.org is a petition website operated by for-profit Change.org, Inc., an American certified B corporation which claims to have over 100 million users and hosts sponsored campaigns for organizations. The website serves to facilitate petitions by the general public.

Corporations including Virgin America, and organizations such as Amnesty International and the Humane Society, pay the site to host and promote their petitions. Change.org’s stated mission is to “empower people everywhere to create the change they want to see.Popular topics of Change.org petitions are animal rights, economic and criminal justice, human rights, education, environmental protection, animals rights, health, and sustainable food.

https://www.change.org/