While grooming herself daily, the cat swallows many hairs from her fur. These hairs need to be expelled as soon as possible, because otherwise hairballs will form in the intestine, which can have unpleasant consequences. Grass is a natural digestive aid that helps expel hairballs naturally. Now you can grow your own with seeds from Trixie. This particular grass is made from wheat. Wheat leaves are not as sharp as regular grass, so they do not cause injuries to the cat's throat and are also rich in vitamins.