Gin changed homes after his original owner passed away. Since moving in 2002, he has learned to pull a cart (see video of him learning to cart below), and has worked as a neutral dog.
A neutral dog is a dog who works with on-leash dog-aggressive dogs. The job of the neutral dog is to ignore the barking and lunging dog, and to never respond to the dog. This is a highly prized skill, and the work that Gin does is extremely helpful to the dogs who are working to overcome their issues with other dogs.