Have you ever asked: Why does my dogbark when left alone?jump up at visitors?pull on the lead?This practical and authoritative book, from a leading dog expert, gives you all the answers and explains how to change problem behaviour without resorting to punishment.Using your dog's psychology, the instincts it has inherited from his wolf ancestors, John Fisher provides a fascinating insight into the roots of a dog's behaviour. Written with both dog and owner in mind.