Many dog owners sense that their pets are totally incompatible with the modern world; instincts like herding, chasing, and protecting have no natural outlet, and can result in chewing, barking, and lunging. However, as McMillan argues here, the solution isn't as simple as mastering "sit" and "stay"—no matter what kind of dog you have, he is strongly influenced by his DNA. Taking physical and genetic traits into account, McMillan breaks down why your dog acts the way it does, so you can train better and easier, and bond in ways you never thought possible.