Chlorella is a green algae and Spirulina a blue-green algae. They are the most powerful wholefoods known. They provide animals with a broad array of nutrients that your pet requires. They contain the broadest array of nutrients and are the most nutritionally dense wholefoods. They contain vitamins, minerals and lots of natural dietary fiber which encourages better digestion for your pet. They will have more energy and a stronger immune system once Chlorella and Spirulina are added to their diet. They are completely safe and healthy foods for pets of any kind. Animals are often drawn to foods that they instinctively know are healthy for them. You can sprinkle the tablets onto their food or give it to them separately.