What Irving created is not only a dog. It is also the bosom friend of Rip's. Rip often tells his secrets to his dog without knowing he is doing so. He also regards the dog his lazy buddy. The way of personifying the dog is what Irving's good at and also what we should learn from.
Irving is not just a dog to create it, the dog is another identity Rip friends and friends. Rip aimlessly often confide in the dog, and even the dog as lazy friend. This is the genius of anthropomorphic approach.
Irving to create not only the dog, another identity that dog is Rip friend. The dog unbosom Rip often aimless, even the dogs as lazy friends. This is the personification of wisdom