Two zebras having an angry exchange and violently biting, kicking and bumping into each other. Zebra friction is a common occurrence in the animal kingdom. Zebras are known to be quite temperamental and can easily become agitated, especially when in close proximity to each other. In an angry exchange, they will often bite, kick and bump into each other until one backs down. This behavior is believed to help maintain order within the herd and prevents any one zebra from becoming too dominant.