Rabbit does eating their kits, also known as cannibalism, can occur for several reasons. While it is distressing to witness, it is a natural behavior in some situations. Here are some common reasons why a rabbit doe might exhibit cannibalistic behavior:

1. Stress or disturbance: If a doe feels threatened or stressed, such as from loud noises, predators, or handling of her kits by humans, she may become agitated and resort to cannibalism.

2. Poor maternal instincts: Some does may lack proper maternal instincts or have difficulty caring for their young. They may not provide adequate care, leading to the death of some kits, and then proceed to consume them.

3. Lack of nesting material: A doe requires a proper nesting area with sufficient nesting material to create a safe and comfortable environment for her kits. Without an adequate nest, she may feel insecure and may exhibit cannibalism.

4. Health issues: A doe experiencing health problems, such as malnutrition, hormonal imbalances, or infection, may resort to cannibalism. These issues can interfere with her ability to care for her kits properly.

It's important to note that cannibalism in rabbits is not a common occurrence and is often associated with stressful or unfavorable conditions. Providing a suitable and stress-free environment for the doe, ensuring proper nutrition, nesting materials, and minimizing disturbances can help reduce the likelihood of cannibalistic behavior. If cannibalism continues to be a recurring issue, it's recommended to consult with a veterinarian or a rabbit expert to address any underlying health or environmental concerns.