Puppy aptitude testing was developed as early as the 1930's and has been adapted for use for testing for service dogs, then adapted for use for puppies from working breeds for obedience aptitude. The PAT test is used by many breeders to help them properly match puppies with the appropiate families. The purpose of this book is to help not only breeders, but those looking for service dogs, therapy dogs, or performance/show dogs to be able to asses litters so that they can pick their own perfect puppy. It will also help those looking for their perfect companion. This is meant to be a guide to picking the right puppy-best suited for service work, therapy work, performance or show, or just your best companion ever.