Shy dogs are especially put off by hats, huge coats, or packages, so if you have a dog who seems wary of all the strange forms in which humans come, help him out by wearing a hat around the house for a couple of weeks. Get him used to your coming into the house with a backpack or whatever it is that seems to bother him. Most dogs eventually learn to ignore our insectlike ability to change life-forms, but some of them need a little help.
