"Change loves me, defines and stalks me like a laser-guided smart bomb. It comes at me in all forms, suddenly and with enormous impact, from making shifts in work to having and raising a kid to buying a cabin on a distant mountaintop. Sometimes, change comes on four legs." In his popular and widely praised Running to the Mountain , Jon Katz wrote of the strength and support he found in the massive forms of his two yellow Labrador retrievers, Julius...