Dogs are social creatures, but they weren't born knowing how to fit into the human world of carpets, closets, cars, and cats. They need a lot of early encounters with different bits and pieces of the world around them to grow into confident adults. Anything from a tiny twig to a big boulder may be a sudden cause of alarm to a pup. Furthermore, there are vacuum cleaners, hair dryers, doorbells, and television sets to contend with. It can be a scary world for a small Yorkie.