Indeed, many find euphoria in the living presence of a natural ecosystem, an ancient tree or a beloved dog. We all, ultimately, suffer the consequences: The common good and the good of the Commons are inseparable. Sometimes, the best choice might be an older dog. Many older dogs are in need of homes, if you check around local shelters and dog rescue organizations. I advise all ambulatory retirees to consider adopting an easygoing, easy-to-handle, affection-seeking older dog for company that will get them outdoors for some regular walks.