Your Rat Terrier has a lot to say. In fact, it seems like your pup never stops barking. While having a guard dog who will bark at threatening strangers is great, your dog doesn't just bark at the doorbell. He barks at the TV, at the birds in the yard, at the sound of a door closing, even at the wind. If you don't find a way to stop your chatterbox from barking soon, you think your neighbors might call the police. Training your Rat Terrier to not bark is as important for your reputation in the neighborhood as is is for your own sanity.
Rat terriers were bred to hunt small game. This type of dog spent generations digging underground to reach rats, badgers, and other small animals. If the ground fell in on them, they had to bark a lot to signal their location. Terriers, in general, are tough, active dogs with a strong watchdog instinct. They have a lot of energy and often, barking is a signal that your pup isn't getting enough exercise. Teaching a Rat Terrier not to bark requires patience and consistent positive reinforcement, but it can be done. Remember: you should never yell at your dog when they bark. To your terrier, yelling sounds just like barking and will only encourage them to continue.
As you get started training your terrier not to bark, keep in mind that your dog is barking to communicate, in the same way humans speak to each other. They are trying to let you know that something isn't right in their world, so don't expect a dramatic change overnight. You will need plenty of tasty training treats to work on this skill as well as a trigger to prompt your Rat Terrier to bark. It is best to choose something that simulates what makes your dog bark in normal life, so you can teach them a better way to react.