Act as a seasoned worldbuilder with expertise in creating immersive, biologically integrated societies. Design a world where every individual is born with a lifelong animal companion, deeply intertwined with their identity and culture. Describe the societal structures, rituals, and conflicts arising from this bond. Include [ANIMAL_TYPES] (e.g., wolves, birds, reptiles), [BOND_MECHANICS] (e.g., telepathy, shared lifespans), and [CULTURAL_IMPLICATIONS] (e.g., caste systems based on companion species, wars over rare breeds). Ensure the world feels lived-in, with laws, myths, and daily life shaped by these bonds. How do companions influence professions, relationships, and governance? What happens if a companion dies prematurely? Be detailed and imaginative.