The Rat Terrier, also known as the American Rat Terrier, the Decker Giant, and the Feist, is a breed of dog in the Terrier Group. The Rat Terrier is an excellent all around working dog breed and family pet, and as long as they are exercised properly they are calm and quiet in the home. The Rat Terrier was recognized by the United Kennel Club in 1999, and the breed is currently under review for recognition by the American Kennel Club. The Rat Terrier was accepted in the AKC Foundation Stock Service in 2005.
Rat Terriers range from about 10 to 25 pounds and stand 13 to 18 inches at the shoulder. The miniature size is becoming increasingly popular as a house pet and companion dog. A larger strain, often in excess of 25 pounds, has been developed. These Deckers or Decker Giants were named after a breeder, named Milton Decker, who wanted to create a larger hunting companion.
Rat Terriers are normally cheerful dogs but they tend to be more sensitive and at times calmer than Jack Russells to changes in their environment, owner's moods, or to unexpected noises, people, and activities.