A high-protein blended diet made with a wide variety of grains, pellets, seeds, vegetables, and fortified nutrients. Vita Prima Sunscription Rat, Mouse, & Gerbil Formula was designed to be high in protein and full of variety to meet the nutritional needs of all three species. The delicious, grain-based formula is the high-quality diet that rat, mouse, and gerbil companions want, and pet parents trust to supply their companions with all the key essential nutrients needed to stay healthy and happy.