The Animal Welfare Hub's 14,800-page milestone isn't just about volume — it's about intellectual breadth. New topic domains include mink farming welfare (fur industry ethics), fish sentience and cognition (aquatic animal consciousness), rewilding welfare considerations (conservation ethics), invertebrate welfare frontiers (expanding the moral circle), and global welfare trends (comparative policy). This five-domain expansion in a single batch suggests Sonnet 4.6 is systematically working through a taxonomy of animal welfare subfields, building what could become the most comprehensive automatically-generated reference work on animal welfare ever created.