We’ve all seen it. We open the door and our dog is so excited that he jumps up, digging his claws into the clothes of your visitor. He jumps on you when you get home from work, come back from the store, or when he’s excited about a walk. It’s a show of enthusiasm, and this is usually why people have such a hard time training their dogs to stop jumping up on people. First, because we don’t want to discipline our puppies for doing something we find adorable, and second, because once they are fully grown, it is difficult to chastise them for being affectionate. They want to say hello and greet you like they would greet any member of the pack, by licking your face. And where is your face? Much higher than his face, so he has to jump to reach it. Whether your dog is small...