"Norwegian dog trainer and behaviorist Turid Rugaas has made it her life work to study canine social interaction. She coined the phrase calming signals to describe the social skills, sometimes referred to as body language, that dogs use to avoid conflict, invite play, and communicate a wide range of information to other dogs. Learn to identify situations that are stressful to your dog so that you can resolve or avoid them. Rehabilitate a dog that has lost her ability to read or give calming signals." --Amazon.com.