Rat Terriers enjoy outdoor activities. The social sensitivity of Rat Terriers makes them very trainable and easier to live with for the average pet owner, but it also means that extensive socialization from an early age is critical. Proper socialization of a Rat Terrier puppy includes exposing the animal to a wide variety of people and places, particularly during the first three months of life. Like most active and intelligent breeds, Rat Terriers tend to be happier when they receive a great deal of mental stimulation and exercise. Rat terriers are usually loyal to their owners and are very respectful, if they receive the proper amount of training at a young age.