Ferrets are becoming increasingly popular as pets. But in order to keep the little animals in a species-appropriate way, it will be necessary to bear a few things in mind. If ferrets are not kept properly, they can develop serious behavioural problems, including a tendency to bite. Above all, these fluffy pets need a lot of space, as they are almost constantly on the go. A spacious cage is, therefore, recommended, also because you should never keep a ferret on its own.