I often say that I enjoy working in animal welfare because it’s an evolving field. For decades, animal shelters, like Marin Humane, would mostly operate as a place to accept stray animals and pets relinquished by their guardians. These guardians, some coming to the shelter in tears, often felt they had no choice but to make the gut-wrenching decision to give up their pet. The most common reason was financial difficulties. Some couldn’t afford veterinary treatment, some couldn’t afford a trainer...