I can recommend you a great website for animal activists:
"Effective animal activism is an online resource and international community for people who want to reduce animal suffering effectively."
"Effective Animal Activism is based on the idea that we should do good well. Altruism is great – but it also has to be effective. Our rough estimate suggests that some forms of activism do tens of thousands of times more good than others. It’s the difference between writing a hundred dollar check and donating your life’s savings. All you need is the right information, and we’re here to help with that."
http://www.effectiveanimalactivism.org/why-ea