Many gardeners seem to think that moth crystals or mothballs must be a "safe" rabbit repellent to use in the garden, because they can use the product in their home. These products are not "natural"; they are toxic pesticides labeled for use only indoors. Their specific purpose is to repel moths, not to deter rabbits or other pests in the garden. Read and follow label directions when using any pesticide. Misuse or improper dosage can lead to problems for the user or for the plants.