Are you familiar with the Humane Society of the U.S.?  They do important work.
its Philanthropy 400 listing. 
As of 2001, the group's major campaigns targeted five issues: factory farming, animal blood sports, the fur trade, puppy mills, and wildlife abuse. The organization works on a full range of animal issues, including companion animals, wildlife, farm animals, horses and other equines, and animals used in research, testing and education.
HSUS reported its revenue as US$129 million and net assets of US$215 million as of December 31, 2014.
HSUS pursues its global
things that people are able to read and want to read. Pullman has stated that, "He has a quality that I have much respect for in the kind of work that we do" and "He's a person who's very easy to understand, both when you talk to him and when he's doing his work. He's accessible, humane, funny when it's appropriate, and witty almost all of the time. And that's a very important quality for someone who wants to be a communicator.