In the early 1970s, a hairless puppy was born in a litter of Rat Terrier puppies. That puppy was the origin of the American Hairless Terrier (AHT) breed. In fact, for many years, the breed was known as Rat Terrier—Hairless Variety. In January, 2004, the breed was renamed.The breed has two sizes: toy and miniature. The toys are 7.5 to 11 inches tall and weigh between 4 and 8 pounds. The miniatures are 11.5 to 16 inches tall and weigh between 8.5 to 16 pounds. In both sizes, the dogs strongly retain their Rat Terrier heritage and appearance. They are well-balanced and muscular. Although puppies are born with short, fuzzy hair, by 8 weeks old, they have lost it. Their skin is soft, smooth, and warm. They have freckles or spots of black, brown, or red
