Puppies are incomparably cute and incomparably entertaining, and, best of all, they smell exactly like puppies. At middle age, a dog has settled into the knuckleheaded matrix of behavior we find so appealing -- his unquestioning loyalty, his irrepressible willingness to please, his infectious happiness. His unequivocal love. But it is not until a dog gets old that his most important virtues ripen and coalesce. Old dogs can be cloudy-eyed and grouchy, gray of muzzle, graceless of gait, odd of habit, hard of hearing, pimply, wheezy, lazy and lumpy. But to anyone who has ever known an old dog, these flaws are of little consequence. Old dogs are vulnerable. They show exorbitant gratitude and limitless trust. They are without artifice. They are funny in new and unexpected ways. But, above all, they seem at peace.Something About Harry: Gene Weingarten On Why Old Dogs Are The Best Dogs (Washington Post, 5 October 2008)
This brings to mind something that Ben Franklin said, in the guise of Poor Richard: "There are three faithful friends: an old wife, an old dog, and ready money."