Hills Prescription Diet B/D Canine 12kgHills Prescription Diet B D Canine 12kg Clinically proven to help maintain learning ability, social interaction and sleep patterns in older dogs. How it helps: Prescription Diet b d Canine is a complete pet food for the nutritional for dogs with behaviour changes associated with old age Key Benefits Helps support brain function With specially selected antioxidants and omega 3 fatty acids to maintain brain function and learning ability in older dogs.