Grow organic greens right out of the bag! Pet Greens® Self Grow Medley is GMO-free Pet Grass seeds and custom soil in a ready-to-grow bag. Just add water and in about a week you will have an all-natural, nutrient-rich treat for your pet! Cereal grasses benefit your pet's health by aiding in digestion for all animals, helping to control hairballs for cats and providing calcium for reptiles. Birds also love to juice and prune the blades.