I found a very good link that shows you how to calculate exactly what is in the food you are feeding your cat. I don't know if this link has been posted before but I thought all of you would find it interesting. The formula works on both canned & dry food. Hopefully this will help others decide what type of food to feed your cat.
http://www.thepetcenter.com/imtop/dm.html
http://www.thepetcenter.com/imtop/dm.html