Is it normal for a unbred rabbit to make nests out of fur?

No, it is not normal for an unbred rabbit to make nests out of fur. Nesting behavior is typically associated with pregnant rabbits, known as does, who prepare a nest to give birth and care for their young. Unbred rabbits, or bucks, do not exhibit nesting behavior unless they have a hormonal disorder or an underlying medical condition. If you observe an unbred rabbit making nests, it is advisable to consult a veterinarian to rule out any potential health issues.