(Virbac) Pet-Tabs Plus AF-Advanced Formula Chewable Tablets is a vitamin and mineral supplement designed especially for active and older dogs. Pet Tabs Plus AF is a balanced formula that gives your dog the specific nutrition they may be lacking in their senior years. Pet Tabs Plus AF for dogs contains vital antioxidants, B vitamins, zinc, iron and more to help boost livelihood and longevity. Feed once daily for improved health, energy and vitality. Dosage for dogs under 20 lbs: 1/2 tablet daily. Over 20 lbs: 1 tablet daily. Tasty pork liver flavor chewable tablets.