The food is made of good ingredients as far as animal feed goes (certainly better than the sugar/casein/milk fat/etc. pseudo-food--I mean, "Western diet" that gave some of the lab rodents cancer--see links above). And it has several supplements, although I doubt if the Lactobacillus bacteria remain alive at room temperature.
Nevertheless, it's a high-carb, low-fat diet that I've come to believe is suboptimal at best and untenable at worst. (I'm making the assumption that dogs and humans have similar dietary needs, since we've been companions for thousands of years and we're both omnivores. But I could be off on that assumption.) In any event, Molly has been continually hungry and has put on a few pounds--a sign of too many carbs. Her time as a stray dog surely didn't do her metabolism any good. And I don't know what Molly's previous owner fed her, but considering that he or she didn't have her spayed and didn't get a $30 microchip for her, I'm guessing Molly ate crappy, grain-based dog food as a puppy.
Since Molly likes to eat as soon as I get home, I made the best high-fat, moderate-protein, low-carb meal I could for her on short notice: 1/2 cup of dog food (instead of one cup), 2 T sprouted rice protein powder, a handful of soaked, roasted almonds, some olive oil, and some raw cauliflower (which I normally feed her). I'm guessing that knocked the carbs down to roughly 25% to 30% of the meal. She loved it (even the protein powder) and hasn't been begging for food. That she's full on a meal rich with fat and protein shouldn't surprise any low-carbers. We'll see if she loses the few pounds she's put on.