After puppies leave their raisers’ homes and are recalled to Guide Dogs for the Blind, they spend approximately four months living on the GDB campus to learn the ins and outs of guide work. This is called formal training or phase training. With eight phases to go through, the dogs must successfully complete one phase of training before advancing to the next. Once a dog completes the eight phases, it then goes into class and is partnered with a visually impaired person. The pair spends two to four weeks in class learning how to work together as a team.