Exotic Nutrition's Glider-Cal Calcium Supplement is designed specifically for Sugar Gliders of various ages. Sugar glider's diet of fruits and vegetables contains inverse amounts of phosphorous to calcium. High phosphorus extracts calcium from their bones, making the bones brittle. Calcium deficiency will make the glider sick, then will cause hind leg paralysis. Hind leg paralysis can be very common in gliders who do not have a calcium supplement like Glider-Cal.