Bitter sprays are a useful tool for discouraging rabbits from chewing on furniture, wires, and other items they should not be chewing on. However, it is important to select a safe product that will not harm your rabbit if ingested. One of the most popular bitter sprays marketed specifically for use with rabbits is Grannick's Bitter Apple Spray. This product contains only natural ingredients like water, vinegar, denatonium benzoate (a bittering agent), and sucrose octaacetate (an artificial sweetener). It has been tested by veterinarians and approved as safe for use around both cats and small animals such as rabbits when used according to package directions.