Nutri-Vet Salmon Flavor Hairball Paw Gel for Cats. Promote healthy digestion and reduce hairballs in your cat of all ages (6 weeks and older) with Nutri-Vet Salmon Flavor Hairball Paw Gel, delivered in a 3 oz tube. This highly palatable gel uses natural oils and lubricants like Hydrogenated Vegetable Oil to help hair safely pass through the intestinal tract. It provides the added benefits of Omega-3 Fatty Acids from vegetable oil and alpha-linolenic acid from soybean oil to actively support healthy skin and a shiny coat. With a taste-tempting Salmon flavor, simply apply the gel (approximately 1/4 teaspoon once or twice daily) to your cat's paw or nose as needed to make hairball prevention easy and enjoyable.