I can provide more specific information if you'd like to dive deeper. For instance, are you interested in: The in your country or state?
The animal rights position is radical because it demands a complete overhaul of civilization. If animals have rights, property laws must change. You cannot own a being with rights. You cannot patent a genetically modified mouse (as the Harvard OncoMouse was) if that mouse has a right to not be a cancer vector.
Welfare advocates work within existing systems to pass laws for larger cages, better veterinary care, and more humane slaughter practices. Understanding Animal Rights: The Philosophical Shift
Despite the progress, the 21st century presents massive challenges for animal advocates: