NaturVet Tear Stain Supplement with Lutein Soft Chews For Dogs & Cats. Formulated for dogs and cats to help with unsightly tear stains from the inside out. For use in dogs and cats over the age of 12 weeks. Helps support the immune system and lubricates mucous membranes to help with tear stains. Formulated for dogs & cats Helps with unsightly tear stains from the inside out Helps support the immune system Lubricates mucous membranes to help with tear stains Available Size: 5.4 oz (154 g) 70 Soft Chews.