Holy Cow (3.5e Monster)

''These herd animals can be aggressive when protecting young and during the mating season, but they generally prefer flight to fighting. A holy cow stands more than 6 feet tall at the shoulder and is 9 to 12 feet long. It weighs 1,800 to 2,400 pounds. Holy cows are celestial cows that are tended by the dairymaids of Amoria for their abundant milk production. Holy cows are more regal and more beautiful than their earthly counterparts. They frequently have a metallic sheen to their glossy hides. The milk from holy cows is particularly tasty and is often churned into magical butter by the aforementioned dairymaids.''

The celestial bulls that the dairymaids ride have the same stats as the holy cows, but they have 2 additional hit dice.

Combat
Smite Evil : Once per day, a holy cow can make a normal melee attack to deal extra damage equal to its hit dice against an evil foe.

Stampede : A frightened herd of holy cows flees as a group in a random direction (but always away from the perceived source of danger). They literally run over anything of Large size or smaller that gets in their way, dealing 1d12 points of damage for each five cows in the herd (Reflex DC 18 half). The save DC is Strength-based.