Re: Need help with picking a food
hmmm, my least favorite of those would actually be the Nutro (based on looking at nutro Natural Choice adult cat food) because it has Corn Gluten Meal and Menadione. Taste of the Wild is grain free and high protein so that's good, although it does use a lot of Potatoes/sweet potatoes to make up for that. If I did not suspect that my cats were sensitive to potatoes (as I do) I would probably go with Taste of the Wild. I switched off of Felidae after they changed their formula because they downgraded by adding a lot of grains and both my cats rejected it. Chicken Soup does not look too bad but is too grainy for my liking, no "bad" grains but there is Barley, Rice, oatmeal and Millet, so I'd say it's along the same lines of Felidae, Felidae has Barley, Brown Rice and Millet I believe. I looked at Premium Edge and it does not look bad, I don't see any red flags, I just don't know of anyone's who's fed or recommended it so I don't know about the company or if it's been in any sort of recall, has poor quality control etc. It has a nice high protein and the formula I'm looking at does not appear to have any grains, but like TOTW uses a lot of potatoes.
The only food I'd avoid is the Nutro as that has things that for me, make the food "off limits" the rest don't have any of those ingredients but some are too grainy for my liking or have things my cats are sensitive to etc. If I had to choose one for most cats it would be Taste of the Wild (plus it looks like it's much cheaper than Natural Balance). You'll have to see how your cats do on it though to really know which is best. Once you clear out all the lesser quality food you find out which is the best of the best by trying it on your cats because each cat is different.
Hope this helps a bit!