Absolutely. We only buy AKC treats from Petco, and I think it's Nutro dog food, or some other high end brand that has no by-products, just real ingredients. That is the best we can do, short of cooking his food ourselves.
I voted yes, but I really haven't been more picky about what I feed my cats because I already feed my cats the very best (wellness), they get some treats here and there but not many because of trying to keep their weight down.