Azolla is a freshwater floating fern, grown naturally in stagnant water. In arid region of Rajasthan, availability of green fodder for livestock is not certain. Its availability totally depends upon monsoon. Azolla is the best substitute of green fodder in arid region of Rajasthan. Farmers can produce Azolla with minimum water and at low production cost throughout the year for their animals. It is very rich in proteins, vitamins (A, B12, Beeta carotene), growth promoter and minerals (Calcium, Phosphorus, Copper, Ferrous, Potassium and Magnesium). Its nutrient composition makes it a highly efficient and effective feed for Livestock. Fresh Azolla should be washed before feeding to get rid of the dung smell. It can be feed directly to livestock or added to the regular feed. It can be mixed with home- made concentrate in the ratio of 1:1. Thirty percent cake can be replaced in the ration of livestock.