Head: Medium length muzzle, with a slightly rounded skull. Eyes: Small and dark in color. Ears: Set well on side of head, wedge shaped, and held erect or semi-erect. Nose: Black and self-colored according to coat. Bite: Scissor or level. Neck: Medium length and strong. Chest: Fairly deep and well ribbed. Body: Back is straight and strong. Legs: Forelegs straight and strong. Hind legs are muscular, with hocks slightly bent. Feet: Small and compact, with arched toes and thick pads. Tail: Set high and carried erect. Movement: Quick, yet well balanced movements. Temperament: Fearless, loyal, and willing to please. *The Rat Terrier comes in three different varieties: Standard, 12-35 pounds; Miniature, under 8 pounds; Toy, 4-6 pounds. The Rat Terrier holds the record for killing rats-2,501 over a seven-hour span. Pups are sometimes born tailless.