Believe it or not, the Humane Society headquarters facility in Gaithersburg, Md., didn't become a dog-friendly workplace until 2007. While one would have expected the Humane Society to be a leader in the dogs-at-work movement, the organization took its time to ensure that everything was done right. To bring their dog to work, employees must submit an application. Once the application is approved, vaccinated dogs are placed on a six-week probation. If everything goes well, the dog can become a permanent member of the workplace. The organization's careful planning has paid off; since its inception four years ago, no dogs have been removed from the program.