An ideal head with fill .
strength and balance. The skull is flat across the top with small, well placed ears which point upwards. No indentations detract from the smooth egg-shape. The eyes are well set, small, dark and triangular.

This head lacks fill under the eyes, so it is not egg-shaped. The eyes are large and placed low in the in the head. The skull is round and the ears are badly placed on the side, pointing outwards. The large, low set eyes and "donkey" ears give this head a poor expression.
.

Discussion.- The expression is a key feature of the Bull Terrier. Together with the dense, muscular, shapely body and correctly shaped head, the "varminty" look is responsible for making the dog a BULL TERRIER and not just a strong, chunky dog. The eye openings should be slanted and triangular, set relatively high in the head, with a dark, keen eye. The ears add to the alert expression and should be close together and pointing upwards. A Bull Terrier with donkey ears and a round, "kind" or pale eye loses the intense, alert "varminty" look so valued in the breed.

Small vertical well shaped ears, a small triangular eye opening set high in this smooth egg-shaped head create the desirable "varminty" expression in this Bull Terrier