<human>:  What is the difference between a cow and a bull?
<bot>: The primary difference between a cow and a bull is their sex. A cow is a female bovine, while a bull is a male bovine. Bulls are generally larger and more muscular than cows, particularly when fully mature. Bulls also typically have larger horns and a stronger sense of smell and hearing than cows, which helps them protect their herds. Additionally, bulls often have a hump on their shoulders that cows lack.