How long ago did this happen? What is her housing set-up like? Do you always have to pick her up to take her out of her hutch? It does sound like your niece scared her, but I’m wondering if she feels more vulnerable because you always have to pick her up?

It sounds like your rabbit Cindel’s sudden change in behavior could be attributed to the stress or fear she experienced when she was introduced to your niece. Rabbits are sensitive animals and can be easily startled or stressed by new people, environments, or experiences. Here’s what you might consider:

1. Stress and Fear in Rabbits: Rabbits can exhibit fear or stress through behaviors like running away, hiding, grunting, or lunging. These behaviors could be triggered by new people, especially young children who may be unpredictable in their movements or noises.
2. Building Trust Again: To rebuild trust with Cindel, it’s important to give her space and time to feel safe again. Avoid forcing interactions and instead let her approach you on her terms. You can encourage her by offering treats and speaking to her in a calm, gentle voice.
3. Slow and Gentle Reintroduction: If you want her to get used to your niece or other new people, it should be done very gradually. Let Cindel observe from a distance where she feels safe, and only proceed if she shows curiosity or calmness.
4. Ensuring a Safe Environment: Make sure her living space is comfortable and secure. A consistent routine, a quiet environment, and familiar objects can help her feel more at ease.
5. Monitor for Other Signs: While you’ve mentioned that she seems healthy, it’s always a good idea to monitor for any other signs of illness or discomfort, as health issues can sometimes cause changes in behavior.
6. Professional Advice: If her behavior continues to be aggressive or you’re unable to rebuild trust, consider consulting a veterinarian or a rabbit behavior specialist. They can provide more specific advice and rule out any underlying health issues.