Lap dogs have been around for hundreds of years and all were bred from working dogs. It would be an odd step to take a wild wolf and set out to make a Yorkie or griffon bruxellois as your main aim !The Maltese terrier is one of the oldest recorded; terriers were bred to control vermin; but this one was a lapdog pure and simple. The papillon and the Cavalier King Charles spaniel were bred from spaniel gundogs . Chihuahuas, it seems, were bred to eat. In Latin and South America they would be a change from cui (guinea pig). on a skewer. Other breds are more obviously bred as small versions of others that worked. The standard poodle was bred to retrieve ducks but the miniature and the toy versions as companions only. The American cocker spaniel is a smaller version of the working cocker spaniel and so on. Some small breeds were bred for a specific function; the Shih-tzu was to accompany Tibetan monks ; the Pekinese was bred for royalty and is, supposedly, to resemble some mythological lion dog . Not all toy and companion dogs are ancient breeds. The toy poodle dates from the 1950s and the American cocker is not much older. As with their ancestors their existence is due to market demand; we still breed dogs for our needs, working or not. Breeds are still being crossed to get certain characteristics for us; the non-moulting but quiet poodle/cocker cross the 'cockerpoo' looks set to become another in time