Sun Chlorella's Rejuv-A-Wafers are a daily superfood supplement for dogs and cats. According to the company, Rejuv-A-Wafers contain antioxidants, vitamin C, vitamin A, minerals, protein, beta-carotene, chlorophyll, fiber, lecithin, eleuthero and lutein. The supplement purifies the pet's body of potentially harmful toxins and chemicals and enhances overall health and appearance, the company says.