Products found to be "complete and balanced" by feeding trials bear the label statement "animal feeding tests using AAFCO procedures substantiate that (name of product) provides complete and balanced nutrition." The protocol requires six of eight animals complete a 26-week feeding trial without showing clinical or pathological signs of nutritional deficiency or excess. The cats' or dogs' general health is evaluated by a veterinarian before and after the test. Four blood values (hemoglobin, packed cell volume, serum alkaline phosphatase and serum albumin) are measured after the trial, and the average values of the test subjects must meet minimum levels. No animal is allowed to lose more than 15% of its starting weight.