Rabbits generally live between four and twenty years.Rabbits are ground dwellers that live in environments ranging from desert to tropical forest and wetland. Rabbits kept in a home as pets for companionship are referred to as house rabbits. They typically have an indoor pen and a rabbit-safe place to run and exercise, such as a living or family room. Rabbits are easily trained to use a litter box and can learn to come when called. Their diet typically consists of unlimited Timothy hay, a small amount of pellets, and fresh vegetables. House rabbits are quiet pets, but are unsuitable for households with small children as they are easily frightened by loud noises and can be harmed by mishandling. Domestic rabbits that are not house rabbits also often serve as companions for their owners, typically living in an easily accessible hutch outside the home.