Ferrets are small, domesticated mammals that are part of the weasel family, Mustelidae. They are likely descended from the European polecat and have been domesticated for around 2,500 years. Ferrets are known for being intelligent, social, and playful, and can form strong bonds with their owners. They can be affectionate like dogs and independent like cats, making them a good companion for some people. However, ferrets can be high maintenance and require as much care as a cat or dog.