These databases can find all types of articles and multi-modal resources. However, they are best at finding academic research articles. Do you need a scholarly or peer reviewed article? It's a good idea to begin here.
This is the Google News aggregation index. While historical coverage is limited, it can be a useful point of entry for contemporary issues research.
This RSS feed is sourced from World Animal News, which tracks current news in animal rights and welfare from around the globe.
These are examples of multimodal information sources. There are many other types of multimodal information and writing. Please consult with your writing instructor about how to incorporate multimodals into your writing assignment.
The following is a selective list of policy institutes (think tanks) and organizations that focus on animal-related topics. This is not a comprehensive list, but it is a place to start.