Typically, no. If you are feeding your dog a premium, high quality diet, that will supplement all the nutritional needs that your dog will require. Now, that may change depending on any health conditions or ailments, and your veterinarian will direct you if that’s the case. But, again, my standard answer, and this applies to my dogs as well, is that if I'm feeding them one of the best foods out there – and for my dogs that's Kismet – I know that all their nutritional needs, which includes vitamins and minerals, are included and covered.