"Why does my dog do that?" It's a question every dog owner has asked--whether their best friend is growling at an unseen foe, or rolling in an objectionable scent. Now, world-leading canine experts and fellow dog-lovers Melissa Starling and Paul McGreevy are here with all the answers: How dogs use body language to communicate (with both people and other dogs) What motivates dogs (and what doesn't) Rules for canine contentment (for example, most dogs...