Pet Greens Original Pet GrassPet Greens Original Pet Grass is great for all your Pets! Now your pets can get their greens on in a tasty, healthy treat! Tasty Greens will be a treat your pets won't be able to resist. Original Pet Grass is gluten free. Pet Greens Original Pet Grass is a super source of green nutrition and fiber. It is a safe alternative to dangerous houseplants and chemically treated grasses. Pet Greens are a pruning and juicing treat for birds along as a great source of calcium for reptiles.