A cow is a much larger animal than a calf. A calf is almost a miniature version of his mother (a cow), only he's more leggy, not as blocky, and way more cuter. Cows produce milk, so they would have an udder between their legs that the calf nurses from, whereas the calf only has tiny nipples (if it's a heifer) or a little nut sac (if it's a bull) hanging from between the legs that cannot be viewed until you have the calf on its back and spread its legs apart to determine it's sex. Calves are more bouncy and playful, were as cows are more lazy and mellower and would rather graze or sit and chew their cud than kick up their heels and chase each other around, inviting another to butt heads. Basically, in a nut shell, a calf is the "baby", offspring, or young of a cow that can be either male (a