Cows live mainly on grasslands and savannas. They are herbivores and often move in search of food. Cows usually live in groups, often herds, and are often raised for meat, milk, and hides. Dogs can live in different environments, from urban to rural. They can live indoors or outdoors and are kept as pets or for protection or hunting. Squirrels live in forests, scrub areas or other areas with lots of trees and food. They usually live alone or in small groups and are kept as pets.