Do you want to keep your cats from eating potentially harmful houseplants, or outdoor grass which sticks to the back of their tongues and might contain pesticides? Because it's grown indoors, cat grass can be served year-round at its peak of freshness to assist your cat with furball elimination by providing valuable fiber. Grass is ready for cats to eat when it is 2"�4" high; place near their water or food bowl for only a few minutes so that they don't binge and then throw up. Feed for a few minutes on a regular basis to get the cat's digestive system used to the grass, and eventually kitty's tummy will adjust to it, allowing absorption of all the nutrients. Safe for dogs, too!