Ferrets have long been popular as pets, particularly in Europe and Australia, but they are not allowed in the United States. This is because ferrets have a reputation as wild animals, and many states consider them to be a nuisance or a risk to public safety. Ferrets are highly social animals and can be trained to use a litter box, however they may get into places they shouldn't and cause damage. Additionally, some states have laws that restrict ferrets because they are considered to be an invasive species that could disrupt the local ecology. As a result, it is not possible to keep ferrets as pets in the United States.