Snowy's Mommy,

I have been volunteering with the Humane Society for about 3 years now and one of the things I do is help socialize the dogs. This gives them a taste of how things will be when they have their own home. Snowy has been fortunate enough and has been given a wonderful home. He has already been exposed to people (members of your family).
I do not know what breed Snowy is, but here are a few tips that may help you out a bit.
First and foremost, you need to make sure that Snowy is comfortable around other people who are not members of the family. Invite a friend over and tell him/her that you are tyring to socialize Snowy. See how Snowy reacts to them. Another good way to expose him to "the world" is to take him for a ride. Let him see and watch him react. Then you might want to take him on a walk in an area where there are people (no dogs this time). Next step is exposing him to other dogs. If Snowy is too big for you to handle (in case he decided to chase the other dog), ask someone who has the physical strenght to help. Take him out on a leash with another dog of his own size or perhaps smaller. It is OK for him to bark. That's how dogs talk to eachother. A good sign to look for is wagging of the tail. If you have a fenced in yard, try to let Snowy and a doggy friend play together (no leashes this time). Don't forget to reward Snowy when he does well. Do not reward him if he attacks anyone or is afraid. This will tell Snowy that it is OK to attack or be afraid.
Hope this helped.