Virbac - Nutri-Plus Gel - Energy Supplement for Cats & Dogs - 120.5GNutriplus Gel is the original, highly palatable energy supplement for cats and dogs. Unlike other products that make use of plant carbohydrate as a source of energy, Nutriplus Gel makes use of animal origin nutrients which allow easier and faster conversion of the nutrient into energy. It also contains liver extract which makes the product highly palatable. 1. Give Nutriplus Gel after an intense exercise to quickly replenish the energy of your pet. 2.