I have a dog, cat and two love birds. I buy all my dog's food here (Solid Gold dry and Innova canned), and my birds' millet. This is a much more holistic store than Petco, but unfortunately I still have to go there for bird seed and supplies. I also feed my cat Nutro dry and they don't stock that food there...it doesn't meet their standards. I have to draw the line financially too, and my cat has done fine on that product for many years.
Anyway, the staff at N to N is much more friendly and knowledgeable than Petco. It's a better experience, I can assure you.