Dogs who have high levels of exercise through working and field trials need more than everyday nutrition to maintain health and stay at peak performance. The same is true for dogs that are pregnant, in lactation or those that are underweight. Eukanuba Working ; Endurance is complete and balanced high quality nutrition for daily feeding. It is designed to provide sustained levels of energy and nutrients for top performance. Eukanuba Working ; Endurance is made with: 30 % more protein + 50 % more fat* for extra energy Dual energy system for fast and sustained energy release Natural + prebiotic fibres to maintain a healthy and stable intestinal environment Cartilage nutrients such as glucosamine and chondroitin sulphate to support healthy joints Rich in omega-3 fatty acids for good nose and scenting ability *compared to Adult Maintenance Large Breed