Small stones and sand can be removed using urohydropropulsion. Prevention is through reducing calcium intake by feeding more hay and less  commercial rabbit pellets, and by not using mineral supplements.
To remove small stones and sand from a rabbit's urinary tract, urohydropropulsion can be used.  Preventing this issue involves decreasing the amount of calcium in their diet by increasing hay consumption and reducing commercial rabbit pellet intake, as well as avoiding the use of mineral supplements.