The plains zebra is one of the 3 migratory animals that dominate the East African savannah. Large numbers of herd animals travel together in a remarkable pattern that blends in with each other. Once the grass in an area is exhausted, they move on. The zebra will often go before their fellow herd, trampling everything in their path. In zoos, zebras are supplied with mineral salt blocks, and are fed alfalfa, grass hay, alfalfa cubes, and mixed pellets.