I'm sure it applies to cat food as well: How to grade your
dog's food: Start with a grade of 100: 1) For every
listing of «by - product», subtract 10 points 2) For every non-specific animal source -LRB-» meat» or «poultry», meat, meal or fat) reference, subtract 10 points 3) If the food
contains BHA, BHT, or ethoxyquin, subtract 10 points 4) For every grain «mill run» or non-specific grain source, subtract 5 points 5) If the same grain ingredient is used 2 or more times in the first five ingredients (i.e. «ground brown rice», «brewerâ $ ™ s rice», «rice flour» are all the same grain), subtract 5 points 6) If the protein sources are not meat meal and there are less than 2 meats in the top 3 ingredients, subtract 3 points 7) If it
contains any artificial colorants, subtract 3 points 8) If it
contains ground corn or whole grain corn, subtract 3 points 9) If corn is
listed in the top 5 ingredients, subtract 2 more points 10) If the food
contains any animal fat other than fish oil, subtract 2 points 11) If lamb is the only animal protein source (unless your
dog is allergic to other protein sources), subtract 2 points 12) If it
contains soy or soybeans, subtract 2 points 13) If it
contains wheat (unless you know that your
dog is not allergic to wheat), subtract 2 points 14) If it
contains beef (unless you know that your
dog is not allergic to beef), subtract 1 point 15) If it
contains salt, subtract 1 point Extra Credit: 1) If any of the meat sources are organic, add 5 points 2) If the food is endorsed by any major
breed group or nutritionist, add 5 points 3) If the food is baked not extruded, add 5 points 4) If the food
contains probiotics, add 3 points 5) If the food
contains fruit, add 3 points 6) If the food
contains vegetables (NOT corn or other grains), add 3 points 7) If the animal sources are hormone - free and antibiotic - free, add 2 points 8) If the food
contains barley, add 2 points 9) If the food
contains flax seed oil (not just the seeds), add 2 points 10) If the food
contains oats or oatmeal, add 1 point 11) If the food
contains sunflower oil, add 1 point 12) For every different specific animal protein source (other than the first one; count «chicken» and «chicken meal» as only one protein source, but «chicken» and «'' as 2 different sources), add 1 point 13) If it
contains glucosamine and chondroitin, add 1 point 14) If the vegetables have been tested for pesticides and are pesticide - free, add 1 point