Chicken Soup can be good for many dogs, for some it's too rich. It does have good ingredients, and if it's readily available you might as well try it! Canidae is one of my favorites, still, because it is generally great for dogs of all ages/sizes, very affordable (cheaper than Chicken Soup) and it has high quality ingredients.

I do not recommend Authority, as they use corn in all of their formulas (except maybe the Harvest Baked?). Wellness has also been going down hill since the new formula.