ROYAL CANIN® VHN FEL Mobility 2kg Complete dietic feed for adult cats. Joint complex plus New Zealand green-lipped mussel extract with nutrients to help maintain healthy joints. High EPA/DHA High EPA/DHA content to help maintain healthy joints. Moderate phosphorus A moderate phosphorus content to help maintain renal function. Antioxidant complex A patented synergistic complex of antioxidants to help neutralise free radicals.