The Healthy Breeds Jack Russell Terrier Senior Multi-Vitamin is a daily supplement that is specifically formulated by veterinarians for dogs over 7 years of age! This multi-vitamin provides a variety of nutrients including B vitamins, DHA, E, K and selenium to help support healthy growth and development. The tasty liver flavored chewable tablets are packed with high quality vitamins and minerals including phosphorus, manganese, zinc, copper, iron, magnesium, selenium and choline.