Salt is an essential mineral for all animals, including rabbits. It helps to regulate fluid levels in the body, aids in digestion, and helps to keep muscles and nerves functioning properly. A lack of salt can lead to dehydration, diarrhea, and even seizures. For rabbits, who are particularly susceptible to dehydration, a salt wheel is an important part of their diet. Salt wheels are also a good source of minerals like calcium and phosphorus, which are essential for keeping bones strong. In addition, the chewing action required to eat a salt wheel can help to keep a rabbit's teeth healthy and clean. For all these reasons, salt wheels are an important part of a healthy diet for rabbits