Most cats instinctively love grazing on grass, almost as much as cows love it. And they have good reason to; Grass contains vitamins, minerals and live enzymes that felines need and crave. But most lawns are treated with various kinds of pesticides that could be toxic to kitty. So bringing a patch of your outdoor grass indoors for kitty is not a safe option. Pet Greens is a 100% organic wheatgrass seed and soil mixture that you can grow directly out of the bag it's packaged in. Wheatgrass is a rich source of vitamins and minerals and is gentler on the digestive system that many of the typical outdoor grasses. According to the manufacturers, as an added bonus, Pet Greens aid in hairball control.