Here are some possible reasons why a rabbit might appear to be killing its kits:
* Stress and disturbance: If a nest is disturbed, a mother rabbit might abandon her kits, which can lead to their death due to exposure or starvation. This can happen if humans or other animals interfere with the nest.
* Predation: A mother rabbit might move her kits to a new location if she senses danger. If she is unable to relocate them, they may fall victim to predators.
* Illness: A sick or injured mother rabbit might not be able to care for her kits, leading to their death.
* Overcrowding: In rare cases, if a nest is overcrowded, a mother rabbit may accidentally harm her kits, especially if they are very young and fragile.
It's important to note that rabbits are incredibly shy and sensitive animals. If you encounter a rabbit nest, it's crucial to avoid disturbing it. The best thing to do is leave it alone and allow the mother to care for her kits.