animal rights law
The pages of the Animal Rights Law Center at Rutgers Law School are a pretty good introduction to a number of legal issues involving how we interact with animals. The latest copyright date I see on their pages is 2001, so I don't know if the site has ceased being updated, or if they will resume with the coming semester. I suspect the later -- this particular study of law has been part of the curriculum at Rutgers since 1990. The Centers includes topics such as how companion animals should be treated in rental housing, students rights and conscientious objection when it comes to harming animals, and many others.