“It is possible to have “too much of a good thing” when it comes to vitamins and minerals; the use of supplements not only is unnecessary but also can be potentially dangerous to your pet’s health. A key point to remember is that cats are neither small dogs nor people. Because of cats’ unique metabolism, what might be good for you might be detrimental to your cat. A high-quality cat food assures an adequate supply of vitamins and minerals in your cat’s diet; supplements should never be added without a veterinarian’s approval.”
?? How many supplements are in your cat’s food?? Check the label. Synthetic supplements are usually present when the actual food ingredients are lacking in natural nutrition, mostly because they’ve been processed out in the heat, pressure & or drying process.
Cornell University, College of Veterinary Medicine: http://www.vet.cornell.edu/fhc/Health_Information/brochure_feedingcat.cfm