The Rat Terrier is a ball of energy. They love to play and are great with kids, especially if they grow up with them. They make a great family or companion dog, as well as good watchdogs, farm dogs, and, obviously, ratting dogs. They are smart, quick learners that are eager to please, making training easy. Like other small dogs, they should not be allowed to get away with behaviors like jumping up on people, as these signs of dominance will begin to manifest in what is commonly known as “small dog syndrome,” which is basically when the dog thinks that they are the leader of the pack. However, if they are trained well, the Rat Terrier is a fantastic companion..