Cows are very social and emotional animals. They like to interact with other cows. They even become friends with others cows. Did you know that cows also can hold a grudge? They will often stay mad at another cow who they felt were mean to them or treated them badly. Cows communicate with other cows by saying moo. Cows will use different tones in their voices when communicating. If they are trying to call their calf (baby) they often will have a soft tone. When they are upset the tone will be loud.